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Finding the Fourth Proportional to 131,290.54, 181,207.73 and 85,407.48

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Solution

The fourth proportional to 131,290.54, 181,207.73 and 85,407.48 is: 117,879.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,290.54 : 181,207.73 = 85,407.48 : x
  2. Step 2: Convert to fraction form
    131,290.54/181,207.73 = 85,407.48/x
  3. Step 3: Cross multiply
    131,290.54x = 181,207.73 × 85,407.48
  4. Step 4: Simplify right side
    131,290.54x = 15,476,495,789.34
  5. Step 5: Solve for x
    x = 15,476,495,789.34/131,290.54
  6. Step 6: Final answer
    x = 117,879.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.