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Finding the Fourth Proportional to 258,544.81, 387,818.94 and 90,068.32

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Solution

The fourth proportional to 258,544.81, 387,818.94 and 90,068.32 is: 135,103.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,544.81 : 387,818.94 = 90,068.32 : x
  2. Step 2: Convert to fraction form
    258,544.81/387,818.94 = 90,068.32/x
  3. Step 3: Cross multiply
    258,544.81x = 387,818.94 × 90,068.32
  4. Step 4: Simplify right side
    258,544.81x = 34,930,201,212.51
  5. Step 5: Solve for x
    x = 34,930,201,212.51/258,544.81
  6. Step 6: Final answer
    x = 135,103.08

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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.