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Finding the Fourth Proportional to 157,212, 216,951.24 and 85,591.84

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Solution

The fourth proportional to 157,212, 216,951.24 and 85,591.84 is: 118,116.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,212 : 216,951.24 = 85,591.84 : x
  2. Step 2: Convert to fraction form
    157,212/216,951.24 = 85,591.84/x
  3. Step 3: Cross multiply
    157,212x = 216,951.24 × 85,591.84
  4. Step 4: Simplify right side
    157,212x = 18,569,255,821.88
  5. Step 5: Solve for x
    x = 18,569,255,821.88/157,212
  6. Step 6: Final answer
    x = 118,116.02

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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.