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Finding the Fourth Proportional to 72,458.70, 99,877.44 and 57,120.24

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Solution

The fourth proportional to 72,458.70, 99,877.44 and 57,120.24 is: 78,734.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,458.70 : 99,877.44 = 57,120.24 : x
  2. Step 2: Convert to fraction form
    72,458.70/99,877.44 = 57,120.24/x
  3. Step 3: Cross multiply
    72,458.70x = 99,877.44 × 57,120.24
  4. Step 4: Simplify right side
    72,458.70x = 5,705,023,343.39
  5. Step 5: Solve for x
    x = 5,705,023,343.39/72,458.70
  6. Step 6: Final answer
    x = 78,734.83

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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.