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Finding the Fourth Proportional to 72,444.20, 108,666.30 and 68,361.80

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Solution

The fourth proportional to 72,444.20, 108,666.30 and 68,361.80 is: 102,542.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,444.20 : 108,666.30 = 68,361.80 : x
  2. Step 2: Convert to fraction form
    72,444.20/108,666.30 = 68,361.80/x
  3. Step 3: Cross multiply
    72,444.20x = 108,666.30 × 68,361.80
  4. Step 4: Simplify right side
    72,444.20x = 7,428,623,867.34
  5. Step 5: Solve for x
    x = 7,428,623,867.34/72,444.20
  6. Step 6: Final answer
    x = 102,542.70

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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.