Home / 72,188.76-99,617.63-39,921.29

Finding the Fourth Proportional to 72,188.76, 99,617.63 and 39,921.29

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Solution

The fourth proportional to 72,188.76, 99,617.63 and 39,921.29 is: 55,089.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,188.76 : 99,617.63 = 39,921.29 : x
  2. Step 2: Convert to fraction form
    72,188.76/99,617.63 = 39,921.29/x
  3. Step 3: Cross multiply
    72,188.76x = 99,617.63 × 39,921.29
  4. Step 4: Simplify right side
    72,188.76x = 3,976,863,972.21
  5. Step 5: Solve for x
    x = 3,976,863,972.21/72,188.76
  6. Step 6: Final answer
    x = 55,089.79

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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.