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Finding the Fourth Proportional to 159,490.32, 220,102.72 and 87,868.80

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Solution

The fourth proportional to 159,490.32, 220,102.72 and 87,868.80 is: 121,262.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,490.32 : 220,102.72 = 87,868.80 : x
  2. Step 2: Convert to fraction form
    159,490.32/220,102.72 = 87,868.80/x
  3. Step 3: Cross multiply
    159,490.32x = 220,102.72 × 87,868.80
  4. Step 4: Simplify right side
    159,490.32x = 19,340,161,663.46
  5. Step 5: Solve for x
    x = 19,340,161,663.46/159,490.32
  6. Step 6: Final answer
    x = 121,262.29

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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.