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Finding the Fourth Proportional to 98,010.50, 135,252.69 and 54,990.78

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Solution

The fourth proportional to 98,010.50, 135,252.69 and 54,990.78 is: 75,886.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,010.50 : 135,252.69 = 54,990.78 : x
  2. Step 2: Convert to fraction form
    98,010.50/135,252.69 = 54,990.78/x
  3. Step 3: Cross multiply
    98,010.50x = 135,252.69 × 54,990.78
  4. Step 4: Simplify right side
    98,010.50x = 7,437,650,920.20
  5. Step 5: Solve for x
    x = 7,437,650,920.20/98,010.50
  6. Step 6: Final answer
    x = 75,886.27

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1.5x scale

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.