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Finding the Fourth Proportional to 80,407.30, 120,458.72 and 53,672.68

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Solution

The fourth proportional to 80,407.30, 120,458.72 and 53,672.68 is: 80,407.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,407.30 : 120,458.72 = 53,672.68 : x
  2. Step 2: Convert to fraction form
    80,407.30/120,458.72 = 53,672.68/x
  3. Step 3: Cross multiply
    80,407.30x = 120,458.72 × 53,672.68
  4. Step 4: Simplify right side
    80,407.30x = 6,465,342,304.37
  5. Step 5: Solve for x
    x = 6,465,342,304.37/80,407.30
  6. Step 6: Final answer
    x = 80,407.40

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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.