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Finding the Fourth Proportional to 72,000.86, 99,360.80 and 40,169.68

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Solution

The fourth proportional to 72,000.86, 99,360.80 and 40,169.68 is: 55,433.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000.86 : 99,360.80 = 40,169.68 : x
  2. Step 2: Convert to fraction form
    72,000.86/99,360.80 = 40,169.68/x
  3. Step 3: Cross multiply
    72,000.86x = 99,360.80 × 40,169.68
  4. Step 4: Simplify right side
    72,000.86x = 3,991,291,540.54
  5. Step 5: Solve for x
    x = 3,991,291,540.54/72,000.86
  6. Step 6: Final answer
    x = 55,433.94

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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.