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Finding the Fourth Proportional to 247,217.88, 370,808.18 and 78,731.40

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Solution

The fourth proportional to 247,217.88, 370,808.18 and 78,731.40 is: 118,091.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,217.88 : 370,808.18 = 78,731.40 : x
  2. Step 2: Convert to fraction form
    247,217.88/370,808.18 = 78,731.40/x
  3. Step 3: Cross multiply
    247,217.88x = 370,808.18 × 78,731.40
  4. Step 4: Simplify right side
    247,217.88x = 29,194,247,142.85
  5. Step 5: Solve for x
    x = 29,194,247,142.85/247,217.88
  6. Step 6: Final answer
    x = 118,091.16

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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.