Home / 54,140.20-81,210.30-39,279.40

Finding the Fourth Proportional to 54,140.20, 81,210.30 and 39,279.40

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Solution

The fourth proportional to 54,140.20, 81,210.30 and 39,279.40 is: 58,919.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,140.20 : 81,210.30 = 39,279.40 : x
  2. Step 2: Convert to fraction form
    54,140.20/81,210.30 = 39,279.40/x
  3. Step 3: Cross multiply
    54,140.20x = 81,210.30 × 39,279.40
  4. Step 4: Simplify right side
    54,140.20x = 3,189,891,857.82
  5. Step 5: Solve for x
    x = 3,189,891,857.82/54,140.20
  6. Step 6: Final answer
    x = 58,919.10

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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.