Home / 260,531.20-390,758.40-73,561.60

Finding the Fourth Proportional to 260,531.20, 390,758.40 and 73,561.60

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Solution

The fourth proportional to 260,531.20, 390,758.40 and 73,561.60 is: 110,331.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,531.20 : 390,758.40 = 73,561.60 : x
  2. Step 2: Convert to fraction form
    260,531.20/390,758.40 = 73,561.60/x
  3. Step 3: Cross multiply
    260,531.20x = 390,758.40 × 73,561.60
  4. Step 4: Simplify right side
    260,531.20x = 28,744,813,117.44
  5. Step 5: Solve for x
    x = 28,744,813,117.44/260,531.20
  6. Step 6: Final answer
    x = 110,331.56

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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.