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Finding the Fourth Proportional to 161,138.66, 241,471.40 and 81,066.57

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Solution

The fourth proportional to 161,138.66, 241,471.40 and 81,066.57 is: 121,480.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,138.66 : 241,471.40 = 81,066.57 : x
  2. Step 2: Convert to fraction form
    161,138.66/241,471.40 = 81,066.57/x
  3. Step 3: Cross multiply
    161,138.66x = 241,471.40 × 81,066.57
  4. Step 4: Simplify right side
    161,138.66x = 19,575,258,151.10
  5. Step 5: Solve for x
    x = 19,575,258,151.10/161,138.66
  6. Step 6: Final answer
    x = 121,480.83

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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.