Home / 81,079.72-121,588.56-38,948.08

Finding the Fourth Proportional to 81,079.72, 121,588.56 and 38,948.08

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Solution

The fourth proportional to 81,079.72, 121,588.56 and 38,948.08 is: 58,407.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,079.72 : 121,588.56 = 38,948.08 : x
  2. Step 2: Convert to fraction form
    81,079.72/121,588.56 = 38,948.08/x
  3. Step 3: Cross multiply
    81,079.72x = 121,588.56 × 38,948.08
  4. Step 4: Simplify right side
    81,079.72x = 4,735,640,961.96
  5. Step 5: Solve for x
    x = 4,735,640,961.96/81,079.72
  6. Step 6: Final answer
    x = 58,407.22

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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.