Home / 72,144.12-99,561.08-40,314.36

Finding the Fourth Proportional to 72,144.12, 99,561.08 and 40,314.36

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Solution

The fourth proportional to 72,144.12, 99,561.08 and 40,314.36 is: 55,635.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.12 : 99,561.08 = 40,314.36 : x
  2. Step 2: Convert to fraction form
    72,144.12/99,561.08 = 40,314.36/x
  3. Step 3: Cross multiply
    72,144.12x = 99,561.08 × 40,314.36
  4. Step 4: Simplify right side
    72,144.12x = 4,013,741,221.11
  5. Step 5: Solve for x
    x = 4,013,741,221.11/72,144.12
  6. Step 6: Final answer
    x = 55,635.04

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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.