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Finding the Fourth Proportional to 74,764.10, 112,019.20 and 45,119.66

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Solution

The fourth proportional to 74,764.10, 112,019.20 and 45,119.66 is: 67,602.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,764.10 : 112,019.20 = 45,119.66 : x
  2. Step 2: Convert to fraction form
    74,764.10/112,019.20 = 45,119.66/x
  3. Step 3: Cross multiply
    74,764.10x = 112,019.20 × 45,119.66
  4. Step 4: Simplify right side
    74,764.10x = 5,054,268,217.47
  5. Step 5: Solve for x
    x = 5,054,268,217.47/74,764.10
  6. Step 6: Final answer
    x = 67,602.88

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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.