Home / 55,177.13-76,139.17-30,972.55

Finding the Fourth Proportional to 55,177.13, 76,139.17 and 30,972.55

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Solution

The fourth proportional to 55,177.13, 76,139.17 and 30,972.55 is: 42,739.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,177.13 : 76,139.17 = 30,972.55 : x
  2. Step 2: Convert to fraction form
    55,177.13/76,139.17 = 30,972.55/x
  3. Step 3: Cross multiply
    55,177.13x = 76,139.17 × 30,972.55
  4. Step 4: Simplify right side
    55,177.13x = 2,358,223,982.00
  5. Step 5: Solve for x
    x = 2,358,223,982.00/55,177.13
  6. Step 6: Final answer
    x = 42,739.16

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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.