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Finding the Fourth Proportional to 172,679.74, 259,061.08 and 66,061.95

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Solution

The fourth proportional to 172,679.74, 259,061.08 and 66,061.95 is: 99,108.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,679.74 : 259,061.08 = 66,061.95 : x
  2. Step 2: Convert to fraction form
    172,679.74/259,061.08 = 66,061.95/x
  3. Step 3: Cross multiply
    172,679.74x = 259,061.08 × 66,061.95
  4. Step 4: Simplify right side
    172,679.74x = 17,114,080,113.91
  5. Step 5: Solve for x
    x = 17,114,080,113.91/172,679.74
  6. Step 6: Final answer
    x = 99,108.79

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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.