Home / 81,155.36-121,750.32-34,407.20

Finding the Fourth Proportional to 81,155.36, 121,750.32 and 34,407.20

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Solution

The fourth proportional to 81,155.36, 121,750.32 and 34,407.20 is: 51,618.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,155.36 : 121,750.32 = 34,407.20 : x
  2. Step 2: Convert to fraction form
    81,155.36/121,750.32 = 34,407.20/x
  3. Step 3: Cross multiply
    81,155.36x = 121,750.32 × 34,407.20
  4. Step 4: Simplify right side
    81,155.36x = 4,189,087,610.30
  5. Step 5: Solve for x
    x = 4,189,087,610.30/81,155.36
  6. Step 6: Final answer
    x = 51,618.13

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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.