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Finding the Fourth Proportional to 281,054.52, 387,850.68 and 153,729

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Solution

The fourth proportional to 281,054.52, 387,850.68 and 153,729 is: 212,143.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,054.52 : 387,850.68 = 153,729 : x
  2. Step 2: Convert to fraction form
    281,054.52/387,850.68 = 153,729/x
  3. Step 3: Cross multiply
    281,054.52x = 387,850.68 × 153,729
  4. Step 4: Simplify right side
    281,054.52x = 59,623,897,185.72
  5. Step 5: Solve for x
    x = 59,623,897,185.72/281,054.52
  6. Step 6: Final answer
    x = 212,143.53

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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.