Home / 78,545.06-117,731.90-38,591.54

Finding the Fourth Proportional to 78,545.06, 117,731.90 and 38,591.54

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Solution

The fourth proportional to 78,545.06, 117,731.90 and 38,591.54 is: 57,845.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,545.06 : 117,731.90 = 38,591.54 : x
  2. Step 2: Convert to fraction form
    78,545.06/117,731.90 = 38,591.54/x
  3. Step 3: Cross multiply
    78,545.06x = 117,731.90 × 38,591.54
  4. Step 4: Simplify right side
    78,545.06x = 4,543,455,328.13
  5. Step 5: Solve for x
    x = 4,543,455,328.13/78,545.06
  6. Step 6: Final answer
    x = 57,845.21

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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.