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Finding the Fourth Proportional to 279,673.56, 385,939.89 and 158,812.65

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Solution

The fourth proportional to 279,673.56, 385,939.89 and 158,812.65 is: 219,155.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,673.56 : 385,939.89 = 158,812.65 : x
  2. Step 2: Convert to fraction form
    279,673.56/385,939.89 = 158,812.65/x
  3. Step 3: Cross multiply
    279,673.56x = 385,939.89 × 158,812.65
  4. Step 4: Simplify right side
    279,673.56x = 61,292,136,671.61
  5. Step 5: Solve for x
    x = 61,292,136,671.61/279,673.56
  6. Step 6: Final answer
    x = 219,155.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.