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Finding the Fourth Proportional to 78,318.74, 108,000.42 and 67,025.72

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Solution

The fourth proportional to 78,318.74, 108,000.42 and 67,025.72 is: 92,427.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,318.74 : 108,000.42 = 67,025.72 : x
  2. Step 2: Convert to fraction form
    78,318.74/108,000.42 = 67,025.72/x
  3. Step 3: Cross multiply
    78,318.74x = 108,000.42 × 67,025.72
  4. Step 4: Simplify right side
    78,318.74x = 7,238,805,910.80
  5. Step 5: Solve for x
    x = 7,238,805,910.80/78,318.74
  6. Step 6: Final answer
    x = 92,427.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.