Home / 55,789.97-76,990.10-30,639.47

Finding the Fourth Proportional to 55,789.97, 76,990.10 and 30,639.47

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Solution

The fourth proportional to 55,789.97, 76,990.10 and 30,639.47 is: 42,282.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,789.97 : 76,990.10 = 30,639.47 : x
  2. Step 2: Convert to fraction form
    55,789.97/76,990.10 = 30,639.47/x
  3. Step 3: Cross multiply
    55,789.97x = 76,990.10 × 30,639.47
  4. Step 4: Simplify right side
    55,789.97x = 2,358,935,321.10
  5. Step 5: Solve for x
    x = 2,358,935,321.10/55,789.97
  6. Step 6: Final answer
    x = 42,282.43

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1.5x scale

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.