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Finding the Fourth Proportional to 78,938.88, 118,171.80 and 58,176.96

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Solution

The fourth proportional to 78,938.88, 118,171.80 and 58,176.96 is: 87,091.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.88 : 118,171.80 = 58,176.96 : x
  2. Step 2: Convert to fraction form
    78,938.88/118,171.80 = 58,176.96/x
  3. Step 3: Cross multiply
    78,938.88x = 118,171.80 × 58,176.96
  4. Step 4: Simplify right side
    78,938.88x = 6,874,876,081.73
  5. Step 5: Solve for x
    x = 6,874,876,081.73/78,938.88
  6. Step 6: Final answer
    x = 87,091.13

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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.