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Finding the Fourth Proportional to 173,721.90, 260,728.65 and 85,051.20

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Solution

The fourth proportional to 173,721.90, 260,728.65 and 85,051.20 is: 127,648.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,721.90 : 260,728.65 = 85,051.20 : x
  2. Step 2: Convert to fraction form
    173,721.90/260,728.65 = 85,051.20/x
  3. Step 3: Cross multiply
    173,721.90x = 260,728.65 × 85,051.20
  4. Step 4: Simplify right side
    173,721.90x = 22,175,284,556.88
  5. Step 5: Solve for x
    x = 22,175,284,556.88/173,721.90
  6. Step 6: Final answer
    x = 127,648.18

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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.