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Finding the Fourth Proportional to 71,731.90, 99,009.03 and 50,520.70

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Solution

The fourth proportional to 71,731.90, 99,009.03 and 50,520.70 is: 69,731.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,731.90 : 99,009.03 = 50,520.70 : x
  2. Step 2: Convert to fraction form
    71,731.90/99,009.03 = 50,520.70/x
  3. Step 3: Cross multiply
    71,731.90x = 99,009.03 × 50,520.70
  4. Step 4: Simplify right side
    71,731.90x = 5,002,005,501.92
  5. Step 5: Solve for x
    x = 5,002,005,501.92/71,731.90
  6. Step 6: Final answer
    x = 69,731.95

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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.