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Finding the Fourth Proportional to 72,013.80, 108,020.70 and 67,636.20

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Solution

The fourth proportional to 72,013.80, 108,020.70 and 67,636.20 is: 101,454.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,013.80 : 108,020.70 = 67,636.20 : x
  2. Step 2: Convert to fraction form
    72,013.80/108,020.70 = 67,636.20/x
  3. Step 3: Cross multiply
    72,013.80x = 108,020.70 × 67,636.20
  4. Step 4: Simplify right side
    72,013.80x = 7,306,109,669.34
  5. Step 5: Solve for x
    x = 7,306,109,669.34/72,013.80
  6. Step 6: Final answer
    x = 101,454.30

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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.