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Finding the Fourth Proportional to 86,855.54, 130,310.98 and 38,816.71

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Solution

The fourth proportional to 86,855.54, 130,310.98 and 38,816.71 is: 58,237.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,855.54 : 130,310.98 = 38,816.71 : x
  2. Step 2: Convert to fraction form
    86,855.54/130,310.98 = 38,816.71/x
  3. Step 3: Cross multiply
    86,855.54x = 130,310.98 × 38,816.71
  4. Step 4: Simplify right side
    86,855.54x = 5,058,243,097.66
  5. Step 5: Solve for x
    x = 5,058,243,097.66/86,855.54
  6. Step 6: Final answer
    x = 58,237.43

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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.