Home / 87,276,972.69-120,557,190.95-64,691,131.91

Finding the Fourth Proportional to 87,276,972.69, 120,557,190.95 and 64,691,131.91

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Solution

The fourth proportional to 87,276,972.69, 120,557,190.95 and 64,691,131.91 is: 89,358,978.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,276,972.69 : 120,557,190.95 = 64,691,131.91 : x
  2. Step 2: Convert to fraction form
    87,276,972.69/120,557,190.95 = 64,691,131.91/x
  3. Step 3: Cross multiply
    87,276,972.69x = 120,557,190.95 × 64,691,131.91
  4. Step 4: Simplify right side
    87,276,972.69x = 7,798,981,141,519,266
  5. Step 5: Solve for x
    x = 7,798,981,141,519,266/87,276,972.69
  6. Step 6: Final answer
    x = 89,358,978.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.