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Finding the Fourth Proportional to 256,554.70, 384,874.17 and 79,061.74

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Solution

The fourth proportional to 256,554.70, 384,874.17 and 79,061.74 is: 118,605.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,554.70 : 384,874.17 = 79,061.74 : x
  2. Step 2: Convert to fraction form
    256,554.70/384,874.17 = 79,061.74/x
  3. Step 3: Cross multiply
    256,554.70x = 384,874.17 × 79,061.74
  4. Step 4: Simplify right side
    256,554.70x = 30,428,821,561.26
  5. Step 5: Solve for x
    x = 30,428,821,561.26/256,554.70
  6. Step 6: Final answer
    x = 118,605.59

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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.