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Finding the Fourth Proportional to 78,341.92, 117,252.90 and 71,338.05

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Solution

The fourth proportional to 78,341.92, 117,252.90 and 71,338.05 is: 106,770.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,341.92 : 117,252.90 = 71,338.05 : x
  2. Step 2: Convert to fraction form
    78,341.92/117,252.90 = 71,338.05/x
  3. Step 3: Cross multiply
    78,341.92x = 117,252.90 × 71,338.05
  4. Step 4: Simplify right side
    78,341.92x = 8,364,593,242.85
  5. Step 5: Solve for x
    x = 8,364,593,242.85/78,341.92
  6. Step 6: Final answer
    x = 106,770.34

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1.5x scale

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.