Home / 75,439.20-113,158.64-19,279.30

Finding the Fourth Proportional to 75,439.20, 113,158.64 and 19,279.30

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Solution

The fourth proportional to 75,439.20, 113,158.64 and 19,279.30 is: 28,918.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,439.20 : 113,158.64 = 19,279.30 : x
  2. Step 2: Convert to fraction form
    75,439.20/113,158.64 = 19,279.30/x
  3. Step 3: Cross multiply
    75,439.20x = 113,158.64 × 19,279.30
  4. Step 4: Simplify right side
    75,439.20x = 2,181,619,368.15
  5. Step 5: Solve for x
    x = 2,181,619,368.15/75,439.20
  6. Step 6: Final answer
    x = 28,918.91

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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.