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Finding the Fourth Proportional to 243,400.80, 365,238.66 and 131,078.64

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Solution

The fourth proportional to 243,400.80, 365,238.66 and 131,078.64 is: 196,691.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,400.80 : 365,238.66 = 131,078.64 : x
  2. Step 2: Convert to fraction form
    243,400.80/365,238.66 = 131,078.64/x
  3. Step 3: Cross multiply
    243,400.80x = 365,238.66 × 131,078.64
  4. Step 4: Simplify right side
    243,400.80x = 47,874,986,828.22
  5. Step 5: Solve for x
    x = 47,874,986,828.22/243,400.80
  6. Step 6: Final answer
    x = 196,691.99

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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.