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Finding the Fourth Proportional to 98,040.40, 147,060.60 and 87,672.40

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Solution

The fourth proportional to 98,040.40, 147,060.60 and 87,672.40 is: 131,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,040.40 : 147,060.60 = 87,672.40 : x
  2. Step 2: Convert to fraction form
    98,040.40/147,060.60 = 87,672.40/x
  3. Step 3: Cross multiply
    98,040.40x = 147,060.60 × 87,672.40
  4. Step 4: Simplify right side
    98,040.40x = 12,893,155,747.44
  5. Step 5: Solve for x
    x = 12,893,155,747.44/98,040.40
  6. Step 6: Final answer
    x = 131,508.60

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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.