Home / 72,040.16-99,403.53-40,209.05

Finding the Fourth Proportional to 72,040.16, 99,403.53 and 40,209.05

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Solution

The fourth proportional to 72,040.16, 99,403.53 and 40,209.05 is: 55,481.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,040.16 : 99,403.53 = 40,209.05 : x
  2. Step 2: Convert to fraction form
    72,040.16/99,403.53 = 40,209.05/x
  3. Step 3: Cross multiply
    72,040.16x = 99,403.53 × 40,209.05
  4. Step 4: Simplify right side
    72,040.16x = 3,996,921,507.95
  5. Step 5: Solve for x
    x = 3,996,921,507.95/72,040.16
  6. Step 6: Final answer
    x = 55,481.85

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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.