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Finding the Fourth Proportional to 159,259.46, 219,773.40 and 87,639.44

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Solution

The fourth proportional to 159,259.46, 219,773.40 and 87,639.44 is: 120,939.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,259.46 : 219,773.40 = 87,639.44 : x
  2. Step 2: Convert to fraction form
    159,259.46/219,773.40 = 87,639.44/x
  3. Step 3: Cross multiply
    159,259.46x = 219,773.40 × 87,639.44
  4. Step 4: Simplify right side
    159,259.46x = 19,260,817,702.90
  5. Step 5: Solve for x
    x = 19,260,817,702.90/159,259.46
  6. Step 6: Final answer
    x = 120,939.87

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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.