Home / 81,109.13-121,663.69-25,705.13

Finding the Fourth Proportional to 81,109.13, 121,663.69 and 25,705.13

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Solution

The fourth proportional to 81,109.13, 121,663.69 and 25,705.13 is: 38,557.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,109.13 : 121,663.69 = 25,705.13 : x
  2. Step 2: Convert to fraction form
    81,109.13/121,663.69 = 25,705.13/x
  3. Step 3: Cross multiply
    81,109.13x = 121,663.69 × 25,705.13
  4. Step 4: Simplify right side
    81,109.13x = 3,127,380,295.15
  5. Step 5: Solve for x
    x = 3,127,380,295.15/81,109.13
  6. Step 6: Final answer
    x = 38,557.69

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1.5x scale

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.