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Finding the Fourth Proportional to 153,876.41, 212,348.64 and 89,361.51

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Solution

The fourth proportional to 153,876.41, 212,348.64 and 89,361.51 is: 123,318.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,876.41 : 212,348.64 = 89,361.51 : x
  2. Step 2: Convert to fraction form
    153,876.41/212,348.64 = 89,361.51/x
  3. Step 3: Cross multiply
    153,876.41x = 212,348.64 × 89,361.51
  4. Step 4: Simplify right side
    153,876.41x = 18,975,795,424.31
  5. Step 5: Solve for x
    x = 18,975,795,424.31/153,876.41
  6. Step 6: Final answer
    x = 123,318.42

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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.