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Finding the Fourth Proportional to 78,915.92, 118,326.63 and 36,805.53

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Solution

The fourth proportional to 78,915.92, 118,326.63 and 36,805.53 is: 55,186.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,915.92 : 118,326.63 = 36,805.53 : x
  2. Step 2: Convert to fraction form
    78,915.92/118,326.63 = 36,805.53/x
  3. Step 3: Cross multiply
    78,915.92x = 118,326.63 × 36,805.53
  4. Step 4: Simplify right side
    78,915.92x = 4,355,074,330.26
  5. Step 5: Solve for x
    x = 4,355,074,330.26/78,915.92
  6. Step 6: Final answer
    x = 55,186.26

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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.