Home / 78,487.55-117,660.11-28,532.36

Finding the Fourth Proportional to 78,487.55, 117,660.11 and 28,532.36

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Solution

The fourth proportional to 78,487.55, 117,660.11 and 28,532.36 is: 42,772.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,487.55 : 117,660.11 = 28,532.36 : x
  2. Step 2: Convert to fraction form
    78,487.55/117,660.11 = 28,532.36/x
  3. Step 3: Cross multiply
    78,487.55x = 117,660.11 × 28,532.36
  4. Step 4: Simplify right side
    78,487.55x = 3,357,120,616.16
  5. Step 5: Solve for x
    x = 3,357,120,616.16/78,487.55
  6. Step 6: Final answer
    x = 42,772.65

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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.