Home / 113,375.40-170,127.90-78,340.20

Finding the Fourth Proportional to 113,375.40, 170,127.90 and 78,340.20

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Solution

The fourth proportional to 113,375.40, 170,127.90 and 78,340.20 is: 117,555.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,375.40 : 170,127.90 = 78,340.20 : x
  2. Step 2: Convert to fraction form
    113,375.40/170,127.90 = 78,340.20/x
  3. Step 3: Cross multiply
    113,375.40x = 170,127.90 × 78,340.20
  4. Step 4: Simplify right side
    113,375.40x = 13,327,853,711.58
  5. Step 5: Solve for x
    x = 13,327,853,711.58/113,375.40
  6. Step 6: Final answer
    x = 117,555.08

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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.