Home / 72,489.18-99,970.12-57,185.04

Finding the Fourth Proportional to 72,489.18, 99,970.12 and 57,185.04

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Solution

The fourth proportional to 72,489.18, 99,970.12 and 57,185.04 is: 78,864.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,489.18 : 99,970.12 = 57,185.04 : x
  2. Step 2: Convert to fraction form
    72,489.18/99,970.12 = 57,185.04/x
  3. Step 3: Cross multiply
    72,489.18x = 99,970.12 × 57,185.04
  4. Step 4: Simplify right side
    72,489.18x = 5,716,795,311.00
  5. Step 5: Solve for x
    x = 5,716,795,311.00/72,489.18
  6. Step 6: Final answer
    x = 78,864.12

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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.