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Finding the Fourth Proportional to 147,000.78, 220,543.08 and 72,143.43

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Solution

The fourth proportional to 147,000.78, 220,543.08 and 72,143.43 is: 108,235.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,000.78 : 220,543.08 = 72,143.43 : x
  2. Step 2: Convert to fraction form
    147,000.78/220,543.08 = 72,143.43/x
  3. Step 3: Cross multiply
    147,000.78x = 220,543.08 × 72,143.43
  4. Step 4: Simplify right side
    147,000.78x = 15,910,734,253.96
  5. Step 5: Solve for x
    x = 15,910,734,253.96/147,000.78
  6. Step 6: Final answer
    x = 108,235.71

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1.5x scale

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.