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Finding the Fourth Proportional to 115,238.40, 173,116.80 and 80,246.40

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Solution

The fourth proportional to 115,238.40, 173,116.80 and 80,246.40 is: 120,550.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,238.40 : 173,116.80 = 80,246.40 : x
  2. Step 2: Convert to fraction form
    115,238.40/173,116.80 = 80,246.40/x
  3. Step 3: Cross multiply
    115,238.40x = 173,116.80 × 80,246.40
  4. Step 4: Simplify right side
    115,238.40x = 13,891,999,979.52
  5. Step 5: Solve for x
    x = 13,891,999,979.52/115,238.40
  6. Step 6: Final answer
    x = 120,550.09

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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.