Home / 113,115.12-155,993.88-72,757.68

Finding the Fourth Proportional to 113,115.12, 155,993.88 and 72,757.68

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Solution

The fourth proportional to 113,115.12, 155,993.88 and 72,757.68 is: 100,338.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,115.12 : 155,993.88 = 72,757.68 : x
  2. Step 2: Convert to fraction form
    113,115.12/155,993.88 = 72,757.68/x
  3. Step 3: Cross multiply
    113,115.12x = 155,993.88 × 72,757.68
  4. Step 4: Simplify right side
    113,115.12x = 11,349,752,803.00
  5. Step 5: Solve for x
    x = 11,349,752,803.00/113,115.12
  6. Step 6: Final answer
    x = 100,338.07

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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.