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Finding the Fourth Proportional to 58,091.40, 86,918.40 and 38,408.40

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Solution

The fourth proportional to 58,091.40, 86,918.40 and 38,408.40 is: 57,468.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,091.40 : 86,918.40 = 38,408.40 : x
  2. Step 2: Convert to fraction form
    58,091.40/86,918.40 = 38,408.40/x
  3. Step 3: Cross multiply
    58,091.40x = 86,918.40 × 38,408.40
  4. Step 4: Simplify right side
    58,091.40x = 3,338,396,674.56
  5. Step 5: Solve for x
    x = 3,338,396,674.56/58,091.40
  6. Step 6: Final answer
    x = 57,468.00

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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.