Home / 55,787.28-76,988.22-30,636.78

Finding the Fourth Proportional to 55,787.28, 76,988.22 and 30,636.78

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Solution

The fourth proportional to 55,787.28, 76,988.22 and 30,636.78 is: 42,279.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,787.28 : 76,988.22 = 30,636.78 : x
  2. Step 2: Convert to fraction form
    55,787.28/76,988.22 = 30,636.78/x
  3. Step 3: Cross multiply
    55,787.28x = 76,988.22 × 30,636.78
  4. Step 4: Simplify right side
    55,787.28x = 2,358,671,158.73
  5. Step 5: Solve for x
    x = 2,358,671,158.73/55,787.28
  6. Step 6: Final answer
    x = 42,279.73

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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.