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Finding the Fourth Proportional to 72,931.05, 100,663.57 and 47,500.78

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Solution

The fourth proportional to 72,931.05, 100,663.57 and 47,500.78 is: 65,563.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,931.05 : 100,663.57 = 47,500.78 : x
  2. Step 2: Convert to fraction form
    72,931.05/100,663.57 = 47,500.78/x
  3. Step 3: Cross multiply
    72,931.05x = 100,663.57 × 47,500.78
  4. Step 4: Simplify right side
    72,931.05x = 4,781,598,092.58
  5. Step 5: Solve for x
    x = 4,781,598,092.58/72,931.05
  6. Step 6: Final answer
    x = 65,563.27

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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.