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Finding the Fourth Proportional to 55,512, 83,261.88 and 13,959

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Solution

The fourth proportional to 55,512, 83,261.88 and 13,959 is: 20,936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,512 : 83,261.88 = 13,959 : x
  2. Step 2: Convert to fraction form
    55,512/83,261.88 = 13,959/x
  3. Step 3: Cross multiply
    55,512x = 83,261.88 × 13,959
  4. Step 4: Simplify right side
    55,512x = 1,162,252,582.92
  5. Step 5: Solve for x
    x = 1,162,252,582.92/55,512
  6. Step 6: Final answer
    x = 20,936.96

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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.