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Finding the Fourth Proportional to 153,963.08, 212,422.64 and 89,419.88

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Solution

The fourth proportional to 153,963.08, 212,422.64 and 89,419.88 is: 123,372.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,963.08 : 212,422.64 = 89,419.88 : x
  2. Step 2: Convert to fraction form
    153,963.08/212,422.64 = 89,419.88/x
  3. Step 3: Cross multiply
    153,963.08x = 212,422.64 × 89,419.88
  4. Step 4: Simplify right side
    153,963.08x = 18,994,807,062.04
  5. Step 5: Solve for x
    x = 18,994,807,062.04/153,963.08
  6. Step 6: Final answer
    x = 123,372.48

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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.