Home / 78,435.79-108,242.07-42,625.80

Finding the Fourth Proportional to 78,435.79, 108,242.07 and 42,625.80

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Solution

The fourth proportional to 78,435.79, 108,242.07 and 42,625.80 is: 58,823.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,435.79 : 108,242.07 = 42,625.80 : x
  2. Step 2: Convert to fraction form
    78,435.79/108,242.07 = 42,625.80/x
  3. Step 3: Cross multiply
    78,435.79x = 108,242.07 × 42,625.80
  4. Step 4: Simplify right side
    78,435.79x = 4,613,904,286.20
  5. Step 5: Solve for x
    x = 4,613,904,286.20/78,435.79
  6. Step 6: Final answer
    x = 58,823.97

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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.