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Finding the Fourth Proportional to 98,752.50, 136,278.72 and 54,040.50

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Solution

The fourth proportional to 98,752.50, 136,278.72 and 54,040.50 is: 74,576.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,752.50 : 136,278.72 = 54,040.50 : x
  2. Step 2: Convert to fraction form
    98,752.50/136,278.72 = 54,040.50/x
  3. Step 3: Cross multiply
    98,752.50x = 136,278.72 × 54,040.50
  4. Step 4: Simplify right side
    98,752.50x = 7,364,570,168.16
  5. Step 5: Solve for x
    x = 7,364,570,168.16/98,752.50
  6. Step 6: Final answer
    x = 74,576.04

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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.