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Finding the Fourth Proportional to 98,148.80, 147,050.40 and 80,523.20

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Solution

The fourth proportional to 98,148.80, 147,050.40 and 80,523.20 is: 120,643.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,148.80 : 147,050.40 = 80,523.20 : x
  2. Step 2: Convert to fraction form
    98,148.80/147,050.40 = 80,523.20/x
  3. Step 3: Cross multiply
    98,148.80x = 147,050.40 × 80,523.20
  4. Step 4: Simplify right side
    98,148.80x = 11,840,968,769.28
  5. Step 5: Solve for x
    x = 11,840,968,769.28/98,148.80
  6. Step 6: Final answer
    x = 120,643.03

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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.