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Finding the Fourth Proportional to 173,929.20, 261,066.60 and 85,282.80

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Solution

The fourth proportional to 173,929.20, 261,066.60 and 85,282.80 is: 128,008.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,929.20 : 261,066.60 = 85,282.80 : x
  2. Step 2: Convert to fraction form
    173,929.20/261,066.60 = 85,282.80/x
  3. Step 3: Cross multiply
    173,929.20x = 261,066.60 × 85,282.80
  4. Step 4: Simplify right side
    173,929.20x = 22,264,490,634.48
  5. Step 5: Solve for x
    x = 22,264,490,634.48/173,929.20
  6. Step 6: Final answer
    x = 128,008.93

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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.