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Finding the Fourth Proportional to 78,876.52, 118,038.30 and 61,233.64

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Solution

The fourth proportional to 78,876.52, 118,038.30 and 61,233.64 is: 91,635.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,876.52 : 118,038.30 = 61,233.64 : x
  2. Step 2: Convert to fraction form
    78,876.52/118,038.30 = 61,233.64/x
  3. Step 3: Cross multiply
    78,876.52x = 118,038.30 × 61,233.64
  4. Step 4: Simplify right side
    78,876.52x = 7,227,914,768.41
  5. Step 5: Solve for x
    x = 7,227,914,768.41/78,876.52
  6. Step 6: Final answer
    x = 91,635.82

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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.