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Finding the Fourth Proportional to 100,309.39, 138,428.39 and 60,024.85

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Solution

The fourth proportional to 100,309.39, 138,428.39 and 60,024.85 is: 82,835.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,309.39 : 138,428.39 = 60,024.85 : x
  2. Step 2: Convert to fraction form
    100,309.39/138,428.39 = 60,024.85/x
  3. Step 3: Cross multiply
    100,309.39x = 138,428.39 × 60,024.85
  4. Step 4: Simplify right side
    100,309.39x = 8,309,143,149.48
  5. Step 5: Solve for x
    x = 8,309,143,149.48/100,309.39
  6. Step 6: Final answer
    x = 82,835.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.