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Finding the Fourth Proportional to 121,716.72, 182,575.44 and 42,788.16

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Solution

The fourth proportional to 121,716.72, 182,575.44 and 42,788.16 is: 64,182.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,716.72 : 182,575.44 = 42,788.16 : x
  2. Step 2: Convert to fraction form
    121,716.72/182,575.44 = 42,788.16/x
  3. Step 3: Cross multiply
    121,716.72x = 182,575.44 × 42,788.16
  4. Step 4: Simplify right side
    121,716.72x = 7,812,067,138.79
  5. Step 5: Solve for x
    x = 7,812,067,138.79/121,716.72
  6. Step 6: Final answer
    x = 64,182.37

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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.