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Finding the Fourth Proportional to 156,728.20, 216,284.91 and 89,660.20

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Solution

The fourth proportional to 156,728.20, 216,284.91 and 89,660.20 is: 123,731.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,728.20 : 216,284.91 = 89,660.20 : x
  2. Step 2: Convert to fraction form
    156,728.20/216,284.91 = 89,660.20/x
  3. Step 3: Cross multiply
    156,728.20x = 216,284.91 × 89,660.20
  4. Step 4: Simplify right side
    156,728.20x = 19,392,148,287.58
  5. Step 5: Solve for x
    x = 19,392,148,287.58/156,728.20
  6. Step 6: Final answer
    x = 123,731.07

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1.5x scale

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.