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Finding the Fourth Proportional to 258,652.52, 387,995.18 and 81,166.53

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Solution

The fourth proportional to 258,652.52, 387,995.18 and 81,166.53 is: 121,754.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,652.52 : 387,995.18 = 81,166.53 : x
  2. Step 2: Convert to fraction form
    258,652.52/387,995.18 = 81,166.53/x
  3. Step 3: Cross multiply
    258,652.52x = 387,995.18 × 81,166.53
  4. Step 4: Simplify right side
    258,652.52x = 31,492,222,489.38
  5. Step 5: Solve for x
    x = 31,492,222,489.38/258,652.52
  6. Step 6: Final answer
    x = 121,754.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.