Home / 78,774.30-117,908.55-41,280.90

Finding the Fourth Proportional to 78,774.30, 117,908.55 and 41,280.90

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Solution

The fourth proportional to 78,774.30, 117,908.55 and 41,280.90 is: 61,788.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,774.30 : 117,908.55 = 41,280.90 : x
  2. Step 2: Convert to fraction form
    78,774.30/117,908.55 = 41,280.90/x
  3. Step 3: Cross multiply
    78,774.30x = 117,908.55 × 41,280.90
  4. Step 4: Simplify right side
    78,774.30x = 4,867,371,061.70
  5. Step 5: Solve for x
    x = 4,867,371,061.70/78,774.30
  6. Step 6: Final answer
    x = 61,788.82

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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.