Home / 72,988.07-100,724.85-42,781.95

Finding the Fourth Proportional to 72,988.07, 100,724.85 and 42,781.95

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Solution

The fourth proportional to 72,988.07, 100,724.85 and 42,781.95 is: 59,039.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,988.07 : 100,724.85 = 42,781.95 : x
  2. Step 2: Convert to fraction form
    72,988.07/100,724.85 = 42,781.95/x
  3. Step 3: Cross multiply
    72,988.07x = 100,724.85 × 42,781.95
  4. Step 4: Simplify right side
    72,988.07x = 4,309,205,713.74
  5. Step 5: Solve for x
    x = 4,309,205,713.74/72,988.07
  6. Step 6: Final answer
    x = 59,039.86

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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.