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Finding the Fourth Proportional to 138,745.08, 191,468.22 and 75,082.88

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Solution

The fourth proportional to 138,745.08, 191,468.22 and 75,082.88 is: 103,614.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,745.08 : 191,468.22 = 75,082.88 : x
  2. Step 2: Convert to fraction form
    138,745.08/191,468.22 = 75,082.88/x
  3. Step 3: Cross multiply
    138,745.08x = 191,468.22 × 75,082.88
  4. Step 4: Simplify right side
    138,745.08x = 14,375,985,386.07
  5. Step 5: Solve for x
    x = 14,375,985,386.07/138,745.08
  6. Step 6: Final answer
    x = 103,614.38

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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.