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Finding the Fourth Proportional to 72,126.70, 108,117.15 and 32,712.10

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Solution

The fourth proportional to 72,126.70, 108,117.15 and 32,712.10 is: 49,035.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,126.70 : 108,117.15 = 32,712.10 : x
  2. Step 2: Convert to fraction form
    72,126.70/108,117.15 = 32,712.10/x
  3. Step 3: Cross multiply
    72,126.70x = 108,117.15 × 32,712.10
  4. Step 4: Simplify right side
    72,126.70x = 3,536,739,022.52
  5. Step 5: Solve for x
    x = 3,536,739,022.52/72,126.70
  6. Step 6: Final answer
    x = 49,035.09

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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.