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Finding the Fourth Proportional to 72,695.40, 109,043.10 and 67,446.60

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Solution

The fourth proportional to 72,695.40, 109,043.10 and 67,446.60 is: 101,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695.40 : 109,043.10 = 67,446.60 : x
  2. Step 2: Convert to fraction form
    72,695.40/109,043.10 = 67,446.60/x
  3. Step 3: Cross multiply
    72,695.40x = 109,043.10 × 67,446.60
  4. Step 4: Simplify right side
    72,695.40x = 7,354,586,348.46
  5. Step 5: Solve for x
    x = 7,354,586,348.46/72,695.40
  6. Step 6: Final answer
    x = 101,169.90

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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.