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Finding the Fourth Proportional to 131,386.54, 181,301.54 and 74,035.20

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Solution

The fourth proportional to 131,386.54, 181,301.54 and 74,035.20 is: 102,161.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,386.54 : 181,301.54 = 74,035.20 : x
  2. Step 2: Convert to fraction form
    131,386.54/181,301.54 = 74,035.20/x
  3. Step 3: Cross multiply
    131,386.54x = 181,301.54 × 74,035.20
  4. Step 4: Simplify right side
    131,386.54x = 13,422,695,743.97
  5. Step 5: Solve for x
    x = 13,422,695,743.97/131,386.54
  6. Step 6: Final answer
    x = 102,161.88

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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.