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Finding the Fourth Proportional to 80,482.72, 120,747.12 and 38,953.12

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Solution

The fourth proportional to 80,482.72, 120,747.12 and 38,953.12 is: 58,440.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,482.72 : 120,747.12 = 38,953.12 : x
  2. Step 2: Convert to fraction form
    80,482.72/120,747.12 = 38,953.12/x
  3. Step 3: Cross multiply
    80,482.72x = 120,747.12 × 38,953.12
  4. Step 4: Simplify right side
    80,482.72x = 4,703,477,055.01
  5. Step 5: Solve for x
    x = 4,703,477,055.01/80,482.72
  6. Step 6: Final answer
    x = 58,440.83

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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.