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Finding the Fourth Proportional to 39,366,144.90, 59,001,978.15 and 20,187,029.70

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Solution

The fourth proportional to 39,366,144.90, 59,001,978.15 and 20,187,029.70 is: 30,256,320.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,366,144.90 : 59,001,978.15 = 20,187,029.70 : x
  2. Step 2: Convert to fraction form
    39,366,144.90/59,001,978.15 = 20,187,029.70/x
  3. Step 3: Cross multiply
    39,366,144.90x = 59,001,978.15 × 20,187,029.70
  4. Step 4: Simplify right side
    39,366,144.90x = 1,191,074,685,272,801
  5. Step 5: Solve for x
    x = 1,191,074,685,272,801/39,366,144.90
  6. Step 6: Final answer
    x = 30,256,320.20

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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.