Home / 87,939,761.20-131,909,641.80-42,590,129.20

Finding the Fourth Proportional to 87,939,761.20, 131,909,641.80 and 42,590,129.20

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Solution

The fourth proportional to 87,939,761.20, 131,909,641.80 and 42,590,129.20 is: 63,885,193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,939,761.20 : 131,909,641.80 = 42,590,129.20 : x
  2. Step 2: Convert to fraction form
    87,939,761.20/131,909,641.80 = 42,590,129.20/x
  3. Step 3: Cross multiply
    87,939,761.20x = 131,909,641.80 × 42,590,129.20
  4. Step 4: Simplify right side
    87,939,761.20x = 5,618,048,686,987,721
  5. Step 5: Solve for x
    x = 5,618,048,686,987,721/87,939,761.20
  6. Step 6: Final answer
    x = 63,885,193.80

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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.