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Finding the Fourth Proportional to 258,590.84, 387,886.74 and 81,111.61

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Solution

The fourth proportional to 258,590.84, 387,886.74 and 81,111.61 is: 121,667.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,590.84 : 387,886.74 = 81,111.61 : x
  2. Step 2: Convert to fraction form
    258,590.84/387,886.74 = 81,111.61/x
  3. Step 3: Cross multiply
    258,590.84x = 387,886.74 × 81,111.61
  4. Step 4: Simplify right side
    258,590.84x = 31,462,115,634.06
  5. Step 5: Solve for x
    x = 31,462,115,634.06/258,590.84
  6. Step 6: Final answer
    x = 121,667.56

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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.