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Finding the Fourth Proportional to 100,061.26, 138,119.65 and 61,850.12

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Solution

The fourth proportional to 100,061.26, 138,119.65 and 61,850.12 is: 85,374.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,061.26 : 138,119.65 = 61,850.12 : x
  2. Step 2: Convert to fraction form
    100,061.26/138,119.65 = 61,850.12/x
  3. Step 3: Cross multiply
    100,061.26x = 138,119.65 × 61,850.12
  4. Step 4: Simplify right side
    100,061.26x = 8,542,716,081.63
  5. Step 5: Solve for x
    x = 8,542,716,081.63/100,061.26
  6. Step 6: Final answer
    x = 85,374.86

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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.