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Finding the Fourth Proportional to 72,339.68, 99,830.64 and 40,508.64

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Solution

The fourth proportional to 72,339.68, 99,830.64 and 40,508.64 is: 55,902.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,339.68 : 99,830.64 = 40,508.64 : x
  2. Step 2: Convert to fraction form
    72,339.68/99,830.64 = 40,508.64/x
  3. Step 3: Cross multiply
    72,339.68x = 99,830.64 × 40,508.64
  4. Step 4: Simplify right side
    72,339.68x = 4,044,003,456.73
  5. Step 5: Solve for x
    x = 4,044,003,456.73/72,339.68
  6. Step 6: Final answer
    x = 55,902.98

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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.