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Finding the Fourth Proportional to 279,128.57, 385,285.14 and 158,350.14

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Solution

The fourth proportional to 279,128.57, 385,285.14 and 158,350.14 is: 218,572.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,128.57 : 385,285.14 = 158,350.14 : x
  2. Step 2: Convert to fraction form
    279,128.57/385,285.14 = 158,350.14/x
  3. Step 3: Cross multiply
    279,128.57x = 385,285.14 × 158,350.14
  4. Step 4: Simplify right side
    279,128.57x = 61,009,955,858.92
  5. Step 5: Solve for x
    x = 61,009,955,858.92/279,128.57
  6. Step 6: Final answer
    x = 218,572.96

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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.