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Finding the Fourth Proportional to 98,486.97, 147,708.86 and 28,351.05

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Solution

The fourth proportional to 98,486.97, 147,708.86 and 28,351.05 is: 42,520.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,486.97 : 147,708.86 = 28,351.05 : x
  2. Step 2: Convert to fraction form
    98,486.97/147,708.86 = 28,351.05/x
  3. Step 3: Cross multiply
    98,486.97x = 147,708.86 × 28,351.05
  4. Step 4: Simplify right side
    98,486.97x = 4,187,701,133.55
  5. Step 5: Solve for x
    x = 4,187,701,133.55/98,486.97
  6. Step 6: Final answer
    x = 42,520.36

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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.