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Finding the Fourth Proportional to 159,532.40, 220,154.26 and 87,912.40

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Solution

The fourth proportional to 159,532.40, 220,154.26 and 87,912.40 is: 121,318.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,532.40 : 220,154.26 = 87,912.40 : x
  2. Step 2: Convert to fraction form
    159,532.40/220,154.26 = 87,912.40/x
  3. Step 3: Cross multiply
    159,532.40x = 220,154.26 × 87,912.40
  4. Step 4: Simplify right side
    159,532.40x = 19,354,289,366.82
  5. Step 5: Solve for x
    x = 19,354,289,366.82/159,532.40
  6. Step 6: Final answer
    x = 121,318.86

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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.