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Finding the Fourth Proportional to 71,187.68, 98,230.20 and 39,357.20

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Solution

The fourth proportional to 71,187.68, 98,230.20 and 39,357.20 is: 54,308.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,187.68 : 98,230.20 = 39,357.20 : x
  2. Step 2: Convert to fraction form
    71,187.68/98,230.20 = 39,357.20/x
  3. Step 3: Cross multiply
    71,187.68x = 98,230.20 × 39,357.20
  4. Step 4: Simplify right side
    71,187.68x = 3,866,065,627.44
  5. Step 5: Solve for x
    x = 3,866,065,627.44/71,187.68
  6. Step 6: Final answer
    x = 54,308.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.