Home / 78,380.92-117,537.32-28,444.40

Finding the Fourth Proportional to 78,380.92, 117,537.32 and 28,444.40

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Solution

The fourth proportional to 78,380.92, 117,537.32 and 28,444.40 is: 42,654.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,380.92 : 117,537.32 = 28,444.40 : x
  2. Step 2: Convert to fraction form
    78,380.92/117,537.32 = 28,444.40/x
  3. Step 3: Cross multiply
    78,380.92x = 117,537.32 × 28,444.40
  4. Step 4: Simplify right side
    78,380.92x = 3,343,278,545.01
  5. Step 5: Solve for x
    x = 3,343,278,545.01/78,380.92
  6. Step 6: Final answer
    x = 42,654.24

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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.