Home / 113,107.20-169,660.80-78,115.20

Finding the Fourth Proportional to 113,107.20, 169,660.80 and 78,115.20

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Solution

The fourth proportional to 113,107.20, 169,660.80 and 78,115.20 is: 117,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,107.20 : 169,660.80 = 78,115.20 : x
  2. Step 2: Convert to fraction form
    113,107.20/169,660.80 = 78,115.20/x
  3. Step 3: Cross multiply
    113,107.20x = 169,660.80 × 78,115.20
  4. Step 4: Simplify right side
    113,107.20x = 13,253,087,324.16
  5. Step 5: Solve for x
    x = 13,253,087,324.16/113,107.20
  6. Step 6: Final answer
    x = 117,172.80

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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.