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Finding the Fourth Proportional to 72,000.67, 99,360.98 and 40,169.57

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Solution

The fourth proportional to 72,000.67, 99,360.98 and 40,169.57 is: 55,434.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000.67 : 99,360.98 = 40,169.57 : x
  2. Step 2: Convert to fraction form
    72,000.67/99,360.98 = 40,169.57/x
  3. Step 3: Cross multiply
    72,000.67x = 99,360.98 × 40,169.57
  4. Step 4: Simplify right side
    72,000.67x = 3,991,288,089.78
  5. Step 5: Solve for x
    x = 3,991,288,089.78/72,000.67
  6. Step 6: Final answer
    x = 55,434.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.