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Finding the Fourth Proportional to 87,816.52, 131,745.64 and 28,652.20

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Solution

The fourth proportional to 87,816.52, 131,745.64 and 28,652.20 is: 42,985.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,816.52 : 131,745.64 = 28,652.20 : x
  2. Step 2: Convert to fraction form
    87,816.52/131,745.64 = 28,652.20/x
  3. Step 3: Cross multiply
    87,816.52x = 131,745.64 × 28,652.20
  4. Step 4: Simplify right side
    87,816.52x = 3,774,802,426.41
  5. Step 5: Solve for x
    x = 3,774,802,426.41/87,816.52
  6. Step 6: Final answer
    x = 42,985.11

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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.