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Finding the Fourth Proportional to 90,520, 124,917.60 and 55,192

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Solution

The fourth proportional to 90,520, 124,917.60 and 55,192 is: 76,164.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,520 : 124,917.60 = 55,192 : x
  2. Step 2: Convert to fraction form
    90,520/124,917.60 = 55,192/x
  3. Step 3: Cross multiply
    90,520x = 124,917.60 × 55,192
  4. Step 4: Simplify right side
    90,520x = 6,894,452,179.20
  5. Step 5: Solve for x
    x = 6,894,452,179.20/90,520
  6. Step 6: Final answer
    x = 76,164.96

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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.