Home / 72,000.29-99,360.47-40,169.20

Finding the Fourth Proportional to 72,000.29, 99,360.47 and 40,169.20

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Solution

The fourth proportional to 72,000.29, 99,360.47 and 40,169.20 is: 55,433.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000.29 : 99,360.47 = 40,169.20 : x
  2. Step 2: Convert to fraction form
    72,000.29/99,360.47 = 40,169.20/x
  3. Step 3: Cross multiply
    72,000.29x = 99,360.47 × 40,169.20
  4. Step 4: Simplify right side
    72,000.29x = 3,991,230,142.28
  5. Step 5: Solve for x
    x = 3,991,230,142.28/72,000.29
  6. Step 6: Final answer
    x = 55,433.53

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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.