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Finding the Fourth Proportional to 156,314.58, 215,685.72 and 87,405.29

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Solution

The fourth proportional to 156,314.58, 215,685.72 and 87,405.29 is: 120,603.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,314.58 : 215,685.72 = 87,405.29 : x
  2. Step 2: Convert to fraction form
    156,314.58/215,685.72 = 87,405.29/x
  3. Step 3: Cross multiply
    156,314.58x = 215,685.72 × 87,405.29
  4. Step 4: Simplify right side
    156,314.58x = 18,852,073,307.90
  5. Step 5: Solve for x
    x = 18,852,073,307.90/156,314.58
  6. Step 6: Final answer
    x = 120,603.42

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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.