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Finding the Fourth Proportional to 72,966.95, 100,694.19 and 39,432.95

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Solution

The fourth proportional to 72,966.95, 100,694.19 and 39,432.95 is: 54,417.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,966.95 : 100,694.19 = 39,432.95 : x
  2. Step 2: Convert to fraction form
    72,966.95/100,694.19 = 39,432.95/x
  3. Step 3: Cross multiply
    72,966.95x = 100,694.19 × 39,432.95
  4. Step 4: Simplify right side
    72,966.95x = 3,970,668,456.09
  5. Step 5: Solve for x
    x = 3,970,668,456.09/72,966.95
  6. Step 6: Final answer
    x = 54,417.36

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1.5x scale

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.