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Finding the Fourth Proportional to 100,407.62, 150,373.96 and 87,188.15

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Solution

The fourth proportional to 100,407.62, 150,373.96 and 87,188.15 is: 130,576.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,407.62 : 150,373.96 = 87,188.15 : x
  2. Step 2: Convert to fraction form
    100,407.62/150,373.96 = 87,188.15/x
  3. Step 3: Cross multiply
    100,407.62x = 150,373.96 × 87,188.15
  4. Step 4: Simplify right side
    100,407.62x = 13,110,827,380.57
  5. Step 5: Solve for x
    x = 13,110,827,380.57/100,407.62
  6. Step 6: Final answer
    x = 130,576.02

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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.