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Finding the Fourth Proportional to 174,722.40, 261,856.80 and 81,028.80

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Solution

The fourth proportional to 174,722.40, 261,856.80 and 81,028.80 is: 121,438.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,722.40 : 261,856.80 = 81,028.80 : x
  2. Step 2: Convert to fraction form
    174,722.40/261,856.80 = 81,028.80/x
  3. Step 3: Cross multiply
    174,722.40x = 261,856.80 × 81,028.80
  4. Step 4: Simplify right side
    174,722.40x = 21,217,942,275.84
  5. Step 5: Solve for x
    x = 21,217,942,275.84/174,722.40
  6. Step 6: Final answer
    x = 121,438.02

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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.