Home / 87,328.78-131,009.40-28,158.28

Finding the Fourth Proportional to 87,328.78, 131,009.40 and 28,158.28

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Solution

The fourth proportional to 87,328.78, 131,009.40 and 28,158.28 is: 42,242.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,328.78 : 131,009.40 = 28,158.28 : x
  2. Step 2: Convert to fraction form
    87,328.78/131,009.40 = 28,158.28/x
  3. Step 3: Cross multiply
    87,328.78x = 131,009.40 × 28,158.28
  4. Step 4: Simplify right side
    87,328.78x = 3,688,999,367.83
  5. Step 5: Solve for x
    x = 3,688,999,367.83/87,328.78
  6. Step 6: Final answer
    x = 42,242.65

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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.