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Finding the Fourth Proportional to 159,872.10, 239,894.55 and 71,139.30

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Solution

The fourth proportional to 159,872.10, 239,894.55 and 71,139.30 is: 106,747.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,872.10 : 239,894.55 = 71,139.30 : x
  2. Step 2: Convert to fraction form
    159,872.10/239,894.55 = 71,139.30/x
  3. Step 3: Cross multiply
    159,872.10x = 239,894.55 × 71,139.30
  4. Step 4: Simplify right side
    159,872.10x = 17,065,930,360.82
  5. Step 5: Solve for x
    x = 17,065,930,360.82/159,872.10
  6. Step 6: Final answer
    x = 106,747.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.