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Finding the Fourth Proportional to 98,680.80, 148,040.40 and 28,562.40

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Solution

The fourth proportional to 98,680.80, 148,040.40 and 28,562.40 is: 42,849.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,680.80 : 148,040.40 = 28,562.40 : x
  2. Step 2: Convert to fraction form
    98,680.80/148,040.40 = 28,562.40/x
  3. Step 3: Cross multiply
    98,680.80x = 148,040.40 × 28,562.40
  4. Step 4: Simplify right side
    98,680.80x = 4,228,389,120.96
  5. Step 5: Solve for x
    x = 4,228,389,120.96/98,680.80
  6. Step 6: Final answer
    x = 42,849.16

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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.