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Finding the Fourth Proportional to 247,558.65, 371,155.86 and 78,981.95

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Solution

The fourth proportional to 247,558.65, 371,155.86 and 78,981.95 is: 118,414.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,558.65 : 371,155.86 = 78,981.95 : x
  2. Step 2: Convert to fraction form
    247,558.65/371,155.86 = 78,981.95/x
  3. Step 3: Cross multiply
    247,558.65x = 371,155.86 × 78,981.95
  4. Step 4: Simplify right side
    247,558.65x = 29,314,611,720.95
  5. Step 5: Solve for x
    x = 29,314,611,720.95/247,558.65
  6. Step 6: Final answer
    x = 118,414.81

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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.