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Finding the Fourth Proportional to 172,034.53, 258,136.34 and 77,331.63

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Solution

The fourth proportional to 172,034.53, 258,136.34 and 77,331.63 is: 116,035.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,034.53 : 258,136.34 = 77,331.63 : x
  2. Step 2: Convert to fraction form
    172,034.53/258,136.34 = 77,331.63/x
  3. Step 3: Cross multiply
    172,034.53x = 258,136.34 × 77,331.63
  4. Step 4: Simplify right side
    172,034.53x = 19,962,103,934.43
  5. Step 5: Solve for x
    x = 19,962,103,934.43/172,034.53
  6. Step 6: Final answer
    x = 116,035.45

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1.5x scale

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.