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Finding the Fourth Proportional to 261,875.82, 392,805.96 and 72,347.56

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Solution

The fourth proportional to 261,875.82, 392,805.96 and 72,347.56 is: 108,519.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,875.82 : 392,805.96 = 72,347.56 : x
  2. Step 2: Convert to fraction form
    261,875.82/392,805.96 = 72,347.56/x
  3. Step 3: Cross multiply
    261,875.82x = 392,805.96 × 72,347.56
  4. Step 4: Simplify right side
    261,875.82x = 28,418,552,759.46
  5. Step 5: Solve for x
    x = 28,418,552,759.46/261,875.82
  6. Step 6: Final answer
    x = 108,519.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.