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Finding the Fourth Proportional to 173,873.30, 260,858.55 and 85,129.70

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Solution

The fourth proportional to 173,873.30, 260,858.55 and 85,129.70 is: 127,718.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,873.30 : 260,858.55 = 85,129.70 : x
  2. Step 2: Convert to fraction form
    173,873.30/260,858.55 = 85,129.70/x
  3. Step 3: Cross multiply
    173,873.30x = 260,858.55 × 85,129.70
  4. Step 4: Simplify right side
    173,873.30x = 22,206,810,103.94
  5. Step 5: Solve for x
    x = 22,206,810,103.94/173,873.30
  6. Step 6: Final answer
    x = 127,718.34

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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.