Home / 138,872.46-191,663.07-85,147.98

Finding the Fourth Proportional to 138,872.46, 191,663.07 and 85,147.98

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Solution

The fourth proportional to 138,872.46, 191,663.07 and 85,147.98 is: 117,515.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872.46 : 191,663.07 = 85,147.98 : x
  2. Step 2: Convert to fraction form
    138,872.46/191,663.07 = 85,147.98/x
  3. Step 3: Cross multiply
    138,872.46x = 191,663.07 × 85,147.98
  4. Step 4: Simplify right side
    138,872.46x = 16,319,723,251.10
  5. Step 5: Solve for x
    x = 16,319,723,251.10/138,872.46
  6. Step 6: Final answer
    x = 117,515.91

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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.