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Finding the Fourth Proportional to 111,987.38, 167,987.19 and 45,417.62

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Solution

The fourth proportional to 111,987.38, 167,987.19 and 45,417.62 is: 68,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,987.38 : 167,987.19 = 45,417.62 : x
  2. Step 2: Convert to fraction form
    111,987.38/167,987.19 = 45,417.62/x
  3. Step 3: Cross multiply
    111,987.38x = 167,987.19 × 45,417.62
  4. Step 4: Simplify right side
    111,987.38x = 7,629,578,360.29
  5. Step 5: Solve for x
    x = 7,629,578,360.29/111,987.38
  6. Step 6: Final answer
    x = 68,128.91

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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.