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Finding the Fourth Proportional to 64,534,911.90, 90,416,061.30 and 64,534,911.90

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Solution

The fourth proportional to 64,534,911.90, 90,416,061.30 and 64,534,911.90 is: 90,416,061.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,534,911.90 : 90,416,061.30 = 64,534,911.90 : x
  2. Step 2: Convert to fraction form
    64,534,911.90/90,416,061.30 = 64,534,911.90/x
  3. Step 3: Cross multiply
    64,534,911.90x = 90,416,061.30 × 64,534,911.90
  4. Step 4: Simplify right side
    64,534,911.90x = 5,834,992,550,340,499
  5. Step 5: Solve for x
    x = 5,834,992,550,340,499/64,534,911.90
  6. Step 6: Final answer
    x = 90,416,061.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.