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Finding the Fourth Proportional to 72,462.70, 99,882.96 and 57,124.24

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Solution

The fourth proportional to 72,462.70, 99,882.96 and 57,124.24 is: 78,740.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,462.70 : 99,882.96 = 57,124.24 : x
  2. Step 2: Convert to fraction form
    72,462.70/99,882.96 = 57,124.24/x
  3. Step 3: Cross multiply
    72,462.70x = 99,882.96 × 57,124.24
  4. Step 4: Simplify right side
    72,462.70x = 5,705,738,178.95
  5. Step 5: Solve for x
    x = 5,705,738,178.95/72,462.70
  6. Step 6: Final answer
    x = 78,740.35

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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.