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Finding the Fourth Proportional to 72,634.71, 100,004.18 and 61,981.59

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Solution

The fourth proportional to 72,634.71, 100,004.18 and 61,981.59 is: 85,336.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,634.71 : 100,004.18 = 61,981.59 : x
  2. Step 2: Convert to fraction form
    72,634.71/100,004.18 = 61,981.59/x
  3. Step 3: Cross multiply
    72,634.71x = 100,004.18 × 61,981.59
  4. Step 4: Simplify right side
    72,634.71x = 6,198,417,773.14
  5. Step 5: Solve for x
    x = 6,198,417,773.14/72,634.71
  6. Step 6: Final answer
    x = 85,336.86

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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.