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Finding the Fourth Proportional to 87,672, 131,525.28 and 28,509.12

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Solution

The fourth proportional to 87,672, 131,525.28 and 28,509.12 is: 42,769.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,672 : 131,525.28 = 28,509.12 : x
  2. Step 2: Convert to fraction form
    87,672/131,525.28 = 28,509.12/x
  3. Step 3: Cross multiply
    87,672x = 131,525.28 × 28,509.12
  4. Step 4: Simplify right side
    87,672x = 3,749,669,990.55
  5. Step 5: Solve for x
    x = 3,749,669,990.55/87,672
  6. Step 6: Final answer
    x = 42,769.30

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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.