Home / 145,121.49-217,610.87-85,266.54

Finding the Fourth Proportional to 145,121.49, 217,610.87 and 85,266.54

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Solution

The fourth proportional to 145,121.49, 217,610.87 and 85,266.54 is: 127,857.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,121.49 : 217,610.87 = 85,266.54 : x
  2. Step 2: Convert to fraction form
    145,121.49/217,610.87 = 85,266.54/x
  3. Step 3: Cross multiply
    145,121.49x = 217,610.87 × 85,266.54
  4. Step 4: Simplify right side
    145,121.49x = 18,554,925,524.96
  5. Step 5: Solve for x
    x = 18,554,925,524.96/145,121.49
  6. Step 6: Final answer
    x = 127,857.88

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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.