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Finding the Fourth Proportional to 98,728.80, 147,661.20 and 88,274.40

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Solution

The fourth proportional to 98,728.80, 147,661.20 and 88,274.40 is: 132,025.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,728.80 : 147,661.20 = 88,274.40 : x
  2. Step 2: Convert to fraction form
    98,728.80/147,661.20 = 88,274.40/x
  3. Step 3: Cross multiply
    98,728.80x = 147,661.20 × 88,274.40
  4. Step 4: Simplify right side
    98,728.80x = 13,034,703,833.28
  5. Step 5: Solve for x
    x = 13,034,703,833.28/98,728.80
  6. Step 6: Final answer
    x = 132,025.34

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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.