Home / 78,691.15-108,595.09-42,881.16

Finding the Fourth Proportional to 78,691.15, 108,595.09 and 42,881.16

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Solution

The fourth proportional to 78,691.15, 108,595.09 and 42,881.16 is: 59,176.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691.15 : 108,595.09 = 42,881.16 : x
  2. Step 2: Convert to fraction form
    78,691.15/108,595.09 = 42,881.16/x
  3. Step 3: Cross multiply
    78,691.15x = 108,595.09 × 42,881.16
  4. Step 4: Simplify right side
    78,691.15x = 4,656,683,932.14
  5. Step 5: Solve for x
    x = 4,656,683,932.14/78,691.15
  6. Step 6: Final answer
    x = 59,176.71

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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.