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Finding the Fourth Proportional to 258,588.52, 387,886.86 and 81,097.07

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Solution

The fourth proportional to 258,588.52, 387,886.86 and 81,097.07 is: 121,646.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,588.52 : 387,886.86 = 81,097.07 : x
  2. Step 2: Convert to fraction form
    258,588.52/387,886.86 = 81,097.07/x
  3. Step 3: Cross multiply
    258,588.52x = 387,886.86 × 81,097.07
  4. Step 4: Simplify right side
    258,588.52x = 31,456,485,898.07
  5. Step 5: Solve for x
    x = 31,456,485,898.07/258,588.52
  6. Step 6: Final answer
    x = 121,646.88

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1.5x scale

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.