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Finding the Fourth Proportional to 156,723.70, 216,278.70 and 89,655.70

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Solution

The fourth proportional to 156,723.70, 216,278.70 and 89,655.70 is: 123,724.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,723.70 : 216,278.70 = 89,655.70 : x
  2. Step 2: Convert to fraction form
    156,723.70/216,278.70 = 89,655.70/x
  3. Step 3: Cross multiply
    156,723.70x = 216,278.70 × 89,655.70
  4. Step 4: Simplify right side
    156,723.70x = 19,390,618,243.59
  5. Step 5: Solve for x
    x = 19,390,618,243.59/156,723.70
  6. Step 6: Final answer
    x = 123,724.86

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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.