Home / 138,771.27-191,508.98-85,045.90

Finding the Fourth Proportional to 138,771.27, 191,508.98 and 85,045.90

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Solution

The fourth proportional to 138,771.27, 191,508.98 and 85,045.90 is: 117,366.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,771.27 : 191,508.98 = 85,045.90 : x
  2. Step 2: Convert to fraction form
    138,771.27/191,508.98 = 85,045.90/x
  3. Step 3: Cross multiply
    138,771.27x = 191,508.98 × 85,045.90
  4. Step 4: Simplify right side
    138,771.27x = 16,287,053,774.80
  5. Step 5: Solve for x
    x = 16,287,053,774.80/138,771.27
  6. Step 6: Final answer
    x = 117,366.18

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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.