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Finding the Fourth Proportional to 81,105.84, 121,663.08 and 25,706.16

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Solution

The fourth proportional to 81,105.84, 121,663.08 and 25,706.16 is: 38,560.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,105.84 : 121,663.08 = 25,706.16 : x
  2. Step 2: Convert to fraction form
    81,105.84/121,663.08 = 25,706.16/x
  3. Step 3: Cross multiply
    81,105.84x = 121,663.08 × 25,706.16
  4. Step 4: Simplify right side
    81,105.84x = 3,127,490,600.57
  5. Step 5: Solve for x
    x = 3,127,490,600.57/81,105.84
  6. Step 6: Final answer
    x = 38,560.61

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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.