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Finding the Fourth Proportional to 21,285,376,200.90, 31,928,064,301.35 and 21,285,376,200.90

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Solution

The fourth proportional to 21,285,376,200.90, 31,928,064,301.35 and 21,285,376,200.90 is: 31,928,064,301.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285,376,200.90 : 31,928,064,301.35 = 21,285,376,200.90 : x
  2. Step 2: Convert to fraction form
    21,285,376,200.90/31,928,064,301.35 = 21,285,376,200.90/x
  3. Step 3: Cross multiply
    21,285,376,200.90x = 31,928,064,301.35 × 21,285,376,200.90
  4. Step 4: Simplify right side
    21,285,376,200.90x = 679,600,860,020,760,248,320
  5. Step 5: Solve for x
    x = 679,600,860,020,760,248,320/21,285,376,200.90
  6. Step 6: Final answer
    x = 31,928,064,301.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.