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Finding the Fourth Proportional to 173,320.80, 259,543.80 and 138,328.80

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Solution

The fourth proportional to 173,320.80, 259,543.80 and 138,328.80 is: 207,144.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,320.80 : 259,543.80 = 138,328.80 : x
  2. Step 2: Convert to fraction form
    173,320.80/259,543.80 = 138,328.80/x
  3. Step 3: Cross multiply
    173,320.80x = 259,543.80 × 138,328.80
  4. Step 4: Simplify right side
    173,320.80x = 35,902,382,401.44
  5. Step 5: Solve for x
    x = 35,902,382,401.44/173,320.80
  6. Step 6: Final answer
    x = 207,144.11

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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.