Home / 78,380.17-117,554.52-38,381.92

Finding the Fourth Proportional to 78,380.17, 117,554.52 and 38,381.92

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Solution

The fourth proportional to 78,380.17, 117,554.52 and 38,381.92 is: 57,565.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,380.17 : 117,554.52 = 38,381.92 : x
  2. Step 2: Convert to fraction form
    78,380.17/117,554.52 = 38,381.92/x
  3. Step 3: Cross multiply
    78,380.17x = 117,554.52 × 38,381.92
  4. Step 4: Simplify right side
    78,380.17x = 4,511,968,182.28
  5. Step 5: Solve for x
    x = 4,511,968,182.28/78,380.17
  6. Step 6: Final answer
    x = 57,565.17

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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.