Home / 72,321.12-99,805.23-40,489.83

Finding the Fourth Proportional to 72,321.12, 99,805.23 and 40,489.83

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Solution

The fourth proportional to 72,321.12, 99,805.23 and 40,489.83 is: 55,877.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,321.12 : 99,805.23 = 40,489.83 : x
  2. Step 2: Convert to fraction form
    72,321.12/99,805.23 = 40,489.83/x
  3. Step 3: Cross multiply
    72,321.12x = 99,805.23 × 40,489.83
  4. Step 4: Simplify right side
    72,321.12x = 4,041,096,795.81
  5. Step 5: Solve for x
    x = 4,041,096,795.81/72,321.12
  6. Step 6: Final answer
    x = 55,877.13

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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.