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Finding the Fourth Proportional to 153,808.66, 212,249.73 and 89,279.20

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Solution

The fourth proportional to 153,808.66, 212,249.73 and 89,279.20 is: 123,201.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,808.66 : 212,249.73 = 89,279.20 : x
  2. Step 2: Convert to fraction form
    153,808.66/212,249.73 = 89,279.20/x
  3. Step 3: Cross multiply
    153,808.66x = 212,249.73 × 89,279.20
  4. Step 4: Simplify right side
    153,808.66x = 18,949,486,094.62
  5. Step 5: Solve for x
    x = 18,949,486,094.62/153,808.66
  6. Step 6: Final answer
    x = 123,201.69

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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.