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Finding the Fourth Proportional to 151,144.56, 208,556.40 and 90,702

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Solution

The fourth proportional to 151,144.56, 208,556.40 and 90,702 is: 125,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,144.56 : 208,556.40 = 90,702 : x
  2. Step 2: Convert to fraction form
    151,144.56/208,556.40 = 90,702/x
  3. Step 3: Cross multiply
    151,144.56x = 208,556.40 × 90,702
  4. Step 4: Simplify right side
    151,144.56x = 18,916,482,592.80
  5. Step 5: Solve for x
    x = 18,916,482,592.80/151,144.56
  6. Step 6: Final answer
    x = 125,154.90

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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.