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Finding the Fourth Proportional to 100,462.01, 138,656.69 and 66,471.17

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Solution

The fourth proportional to 100,462.01, 138,656.69 and 66,471.17 is: 91,742.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,462.01 : 138,656.69 = 66,471.17 : x
  2. Step 2: Convert to fraction form
    100,462.01/138,656.69 = 66,471.17/x
  3. Step 3: Cross multiply
    100,462.01x = 138,656.69 × 66,471.17
  4. Step 4: Simplify right side
    100,462.01x = 9,216,672,080.27
  5. Step 5: Solve for x
    x = 9,216,672,080.27/100,462.01
  6. Step 6: Final answer
    x = 91,742.86

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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.