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Finding the Fourth Proportional to 98,610.78, 147,476.97 and 87,589.02

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Solution

The fourth proportional to 98,610.78, 147,476.97 and 87,589.02 is: 130,993.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,610.78 : 147,476.97 = 87,589.02 : x
  2. Step 2: Convert to fraction form
    98,610.78/147,476.97 = 87,589.02/x
  3. Step 3: Cross multiply
    98,610.78x = 147,476.97 × 87,589.02
  4. Step 4: Simplify right side
    98,610.78x = 12,917,363,274.87
  5. Step 5: Solve for x
    x = 12,917,363,274.87/98,610.78
  6. Step 6: Final answer
    x = 130,993.42

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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.