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Finding the Fourth Proportional to 161,138.51, 241,471.18 and 81,066.41

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Solution

The fourth proportional to 161,138.51, 241,471.18 and 81,066.41 is: 121,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,138.51 : 241,471.18 = 81,066.41 : x
  2. Step 2: Convert to fraction form
    161,138.51/241,471.18 = 81,066.41/x
  3. Step 3: Cross multiply
    161,138.51x = 241,471.18 × 81,066.41
  4. Step 4: Simplify right side
    161,138.51x = 19,575,201,703.70
  5. Step 5: Solve for x
    x = 19,575,201,703.70/161,138.51
  6. Step 6: Final answer
    x = 121,480.60

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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.