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Finding the Fourth Proportional to 100,682.82, 138,931.11 and 60,398.28

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Solution

The fourth proportional to 100,682.82, 138,931.11 and 60,398.28 is: 83,342.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,682.82 : 138,931.11 = 60,398.28 : x
  2. Step 2: Convert to fraction form
    100,682.82/138,931.11 = 60,398.28/x
  3. Step 3: Cross multiply
    100,682.82x = 138,931.11 × 60,398.28
  4. Step 4: Simplify right side
    100,682.82x = 8,391,200,082.49
  5. Step 5: Solve for x
    x = 8,391,200,082.49/100,682.82
  6. Step 6: Final answer
    x = 83,342.92

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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.