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Finding the Fourth Proportional to 121,635.62, 182,378.90 and 42,758.90

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Solution

The fourth proportional to 121,635.62, 182,378.90 and 42,758.90 is: 64,112.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,635.62 : 182,378.90 = 42,758.90 : x
  2. Step 2: Convert to fraction form
    121,635.62/182,378.90 = 42,758.90/x
  3. Step 3: Cross multiply
    121,635.62x = 182,378.90 × 42,758.90
  4. Step 4: Simplify right side
    121,635.62x = 7,798,321,147.21
  5. Step 5: Solve for x
    x = 7,798,321,147.21/121,635.62
  6. Step 6: Final answer
    x = 64,112.15

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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.