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Finding the Fourth Proportional to 177,439.36, 266,211 and 66,640

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Solution

The fourth proportional to 177,439.36, 266,211 and 66,640 is: 99,979.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,439.36 : 266,211 = 66,640 : x
  2. Step 2: Convert to fraction form
    177,439.36/266,211 = 66,640/x
  3. Step 3: Cross multiply
    177,439.36x = 266,211 × 66,640
  4. Step 4: Simplify right side
    177,439.36x = 17,740,301,040
  5. Step 5: Solve for x
    x = 17,740,301,040/177,439.36
  6. Step 6: Final answer
    x = 99,979.51

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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.