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Finding the Fourth Proportional to 153,806.01, 212,257.41 and 89,270.43

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Solution

The fourth proportional to 153,806.01, 212,257.41 and 89,270.43 is: 123,196.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,806.01 : 212,257.41 = 89,270.43 : x
  2. Step 2: Convert to fraction form
    153,806.01/212,257.41 = 89,270.43/x
  3. Step 3: Cross multiply
    153,806.01x = 212,257.41 × 89,270.43
  4. Step 4: Simplify right side
    153,806.01x = 18,948,310,261.39
  5. Step 5: Solve for x
    x = 18,948,310,261.39/153,806.01
  6. Step 6: Final answer
    x = 123,196.16

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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.