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Finding the Fourth Proportional to 71,909.48, 107,856.92 and 19,312.14

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Solution

The fourth proportional to 71,909.48, 107,856.92 and 19,312.14 is: 28,966.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,909.48 : 107,856.92 = 19,312.14 : x
  2. Step 2: Convert to fraction form
    71,909.48/107,856.92 = 19,312.14/x
  3. Step 3: Cross multiply
    71,909.48x = 107,856.92 × 19,312.14
  4. Step 4: Simplify right side
    71,909.48x = 2,082,947,939.01
  5. Step 5: Solve for x
    x = 2,082,947,939.01/71,909.48
  6. Step 6: Final answer
    x = 28,966.25

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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.