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Finding the Fourth Proportional to 82,361.80, 123,542.70 and 72,520.30

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Solution

The fourth proportional to 82,361.80, 123,542.70 and 72,520.30 is: 108,780.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,361.80 : 123,542.70 = 72,520.30 : x
  2. Step 2: Convert to fraction form
    82,361.80/123,542.70 = 72,520.30/x
  3. Step 3: Cross multiply
    82,361.80x = 123,542.70 × 72,520.30
  4. Step 4: Simplify right side
    82,361.80x = 8,959,353,666.81
  5. Step 5: Solve for x
    x = 8,959,353,666.81/82,361.80
  6. Step 6: Final answer
    x = 108,780.45

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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.