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Finding the Fourth Proportional to 55,780.92, 83,630.88 and 18,328.68

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Solution

The fourth proportional to 55,780.92, 83,630.88 and 18,328.68 is: 27,479.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,780.92 : 83,630.88 = 18,328.68 : x
  2. Step 2: Convert to fraction form
    55,780.92/83,630.88 = 18,328.68/x
  3. Step 3: Cross multiply
    55,780.92x = 83,630.88 × 18,328.68
  4. Step 4: Simplify right side
    55,780.92x = 1,532,843,637.64
  5. Step 5: Solve for x
    x = 1,532,843,637.64/55,780.92
  6. Step 6: Final answer
    x = 27,479.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.