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Finding the Fourth Proportional to 120,502.80, 180,719.64 and 46,613.52

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Solution

The fourth proportional to 120,502.80, 180,719.64 and 46,613.52 is: 69,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,502.80 : 180,719.64 = 46,613.52 : x
  2. Step 2: Convert to fraction form
    120,502.80/180,719.64 = 46,613.52/x
  3. Step 3: Cross multiply
    120,502.80x = 180,719.64 × 46,613.52
  4. Step 4: Simplify right side
    120,502.80x = 8,423,978,553.53
  5. Step 5: Solve for x
    x = 8,423,978,553.53/120,502.80
  6. Step 6: Final answer
    x = 69,906.91

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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.