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Finding the Fourth Proportional to 279,128.43, 418,682.93 and 79,449.93

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Solution

The fourth proportional to 279,128.43, 418,682.93 and 79,449.93 is: 119,172.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,128.43 : 418,682.93 = 79,449.93 : x
  2. Step 2: Convert to fraction form
    279,128.43/418,682.93 = 79,449.93/x
  3. Step 3: Cross multiply
    279,128.43x = 418,682.93 × 79,449.93
  4. Step 4: Simplify right side
    279,128.43x = 33,264,329,083.45
  5. Step 5: Solve for x
    x = 33,264,329,083.45/279,128.43
  6. Step 6: Final answer
    x = 119,172.13

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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.