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Finding the Fourth Proportional to 85,812,032.20, 128,718,048.30 and 85,812,032.20

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Solution

The fourth proportional to 85,812,032.20, 128,718,048.30 and 85,812,032.20 is: 128,718,048.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,812,032.20 : 128,718,048.30 = 85,812,032.20 : x
  2. Step 2: Convert to fraction form
    85,812,032.20/128,718,048.30 = 85,812,032.20/x
  3. Step 3: Cross multiply
    85,812,032.20x = 128,718,048.30 × 85,812,032.20
  4. Step 4: Simplify right side
    85,812,032.20x = 11,045,557,305,440,756
  5. Step 5: Solve for x
    x = 11,045,557,305,440,756/85,812,032.20
  6. Step 6: Final answer
    x = 128,718,048.30

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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.