Home / 100,115.11-138,098.82-66,123.64

Finding the Fourth Proportional to 100,115.11, 138,098.82 and 66,123.64

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Solution

The fourth proportional to 100,115.11, 138,098.82 and 66,123.64 is: 91,210.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,115.11 : 138,098.82 = 66,123.64 : x
  2. Step 2: Convert to fraction form
    100,115.11/138,098.82 = 66,123.64/x
  3. Step 3: Cross multiply
    100,115.11x = 138,098.82 × 66,123.64
  4. Step 4: Simplify right side
    100,115.11x = 9,131,596,658.10
  5. Step 5: Solve for x
    x = 9,131,596,658.10/100,115.11
  6. Step 6: Final answer
    x = 91,210.97

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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.