Home / 78,747.30-118,176.29-71,218.55

Finding the Fourth Proportional to 78,747.30, 118,176.29 and 71,218.55

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Solution

The fourth proportional to 78,747.30, 118,176.29 and 71,218.55 is: 106,877.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,747.30 : 118,176.29 = 71,218.55 : x
  2. Step 2: Convert to fraction form
    78,747.30/118,176.29 = 71,218.55/x
  3. Step 3: Cross multiply
    78,747.30x = 118,176.29 × 71,218.55
  4. Step 4: Simplify right side
    78,747.30x = 8,416,344,018.18
  5. Step 5: Solve for x
    x = 8,416,344,018.18/78,747.30
  6. Step 6: Final answer
    x = 106,877.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.