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Finding the Fourth Proportional to 156,728.62, 216,288.08 and 88,743.80

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Solution

The fourth proportional to 156,728.62, 216,288.08 and 88,743.80 is: 122,467.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,728.62 : 216,288.08 = 88,743.80 : x
  2. Step 2: Convert to fraction form
    156,728.62/216,288.08 = 88,743.80/x
  3. Step 3: Cross multiply
    156,728.62x = 216,288.08 × 88,743.80
  4. Step 4: Simplify right side
    156,728.62x = 19,194,226,113.90
  5. Step 5: Solve for x
    x = 19,194,226,113.90/156,728.62
  6. Step 6: Final answer
    x = 122,467.91

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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.