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Finding the Fourth Proportional to 72,123.70, 108,088.84 and 56,132.55

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Solution

The fourth proportional to 72,123.70, 108,088.84 and 56,132.55 is: 84,123.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,123.70 : 108,088.84 = 56,132.55 : x
  2. Step 2: Convert to fraction form
    72,123.70/108,088.84 = 56,132.55/x
  3. Step 3: Cross multiply
    72,123.70x = 108,088.84 × 56,132.55
  4. Step 4: Simplify right side
    72,123.70x = 6,067,301,675.30
  5. Step 5: Solve for x
    x = 6,067,301,675.30/72,123.70
  6. Step 6: Final answer
    x = 84,123.56

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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.