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Finding the Fourth Proportional to 72,010.20, 108,015.30 and 68,729.70

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Solution

The fourth proportional to 72,010.20, 108,015.30 and 68,729.70 is: 103,094.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,010.20 : 108,015.30 = 68,729.70 : x
  2. Step 2: Convert to fraction form
    72,010.20/108,015.30 = 68,729.70/x
  3. Step 3: Cross multiply
    72,010.20x = 108,015.30 × 68,729.70
  4. Step 4: Simplify right side
    72,010.20x = 7,423,859,164.41
  5. Step 5: Solve for x
    x = 7,423,859,164.41/72,010.20
  6. Step 6: Final answer
    x = 103,094.55

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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.