Home / 55,790.28-76,990.64-30,639.78

Finding the Fourth Proportional to 55,790.28, 76,990.64 and 30,639.78

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Solution

The fourth proportional to 55,790.28, 76,990.64 and 30,639.78 is: 42,282.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,790.28 : 76,990.64 = 30,639.78 : x
  2. Step 2: Convert to fraction form
    55,790.28/76,990.64 = 30,639.78/x
  3. Step 3: Cross multiply
    55,790.28x = 76,990.64 × 30,639.78
  4. Step 4: Simplify right side
    55,790.28x = 2,358,976,118.46
  5. Step 5: Solve for x
    x = 2,358,976,118.46/55,790.28
  6. Step 6: Final answer
    x = 42,282.92

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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.