Home / 112,989,861.78-155,917,400.95-63,420,658.91

Finding the Fourth Proportional to 112,989,861.78, 155,917,400.95 and 63,420,658.91

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Solution

The fourth proportional to 112,989,861.78, 155,917,400.95 and 63,420,658.91 is: 87,515,677.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,989,861.78 : 155,917,400.95 = 63,420,658.91 : x
  2. Step 2: Convert to fraction form
    112,989,861.78/155,917,400.95 = 63,420,658.91/x
  3. Step 3: Cross multiply
    112,989,861.78x = 155,917,400.95 × 63,420,658.91
  4. Step 4: Simplify right side
    112,989,861.78x = 9,888,384,304,545,074
  5. Step 5: Solve for x
    x = 9,888,384,304,545,074/112,989,861.78
  6. Step 6: Final answer
    x = 87,515,677.50

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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.