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Finding the Fourth Proportional to 111,987.88, 167,987.94 and 45,418.12

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Solution

The fourth proportional to 111,987.88, 167,987.94 and 45,418.12 is: 68,129.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,987.88 : 167,987.94 = 45,418.12 : x
  2. Step 2: Convert to fraction form
    111,987.88/167,987.94 = 45,418.12/x
  3. Step 3: Cross multiply
    111,987.88x = 167,987.94 × 45,418.12
  4. Step 4: Simplify right side
    111,987.88x = 7,629,696,417.47
  5. Step 5: Solve for x
    x = 7,629,696,417.47/111,987.88
  6. Step 6: Final answer
    x = 68,129.66

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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.