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Finding the Fourth Proportional to 98,566.80, 147,850.20 and 71,998.80

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Solution

The fourth proportional to 98,566.80, 147,850.20 and 71,998.80 is: 107,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,566.80 : 147,850.20 = 71,998.80 : x
  2. Step 2: Convert to fraction form
    98,566.80/147,850.20 = 71,998.80/x
  3. Step 3: Cross multiply
    98,566.80x = 147,850.20 × 71,998.80
  4. Step 4: Simplify right side
    98,566.80x = 10,645,036,979.76
  5. Step 5: Solve for x
    x = 10,645,036,979.76/98,566.80
  6. Step 6: Final answer
    x = 107,998.20

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1.5x scale

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.