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Finding the Fourth Proportional to 159,548.62, 220,178.55 and 87,931.24

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Solution

The fourth proportional to 159,548.62, 220,178.55 and 87,931.24 is: 121,345.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,548.62 : 220,178.55 = 87,931.24 : x
  2. Step 2: Convert to fraction form
    159,548.62/220,178.55 = 87,931.24/x
  3. Step 3: Cross multiply
    159,548.62x = 220,178.55 × 87,931.24
  4. Step 4: Simplify right side
    159,548.62x = 19,360,572,922.90
  5. Step 5: Solve for x
    x = 19,360,572,922.90/159,548.62
  6. Step 6: Final answer
    x = 121,345.91

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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.