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Finding the Fourth Proportional to 158,331.48, 218,492.55 and 86,709.66

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Solution

The fourth proportional to 158,331.48, 218,492.55 and 86,709.66 is: 119,656.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,331.48 : 218,492.55 = 86,709.66 : x
  2. Step 2: Convert to fraction form
    158,331.48/218,492.55 = 86,709.66/x
  3. Step 3: Cross multiply
    158,331.48x = 218,492.55 × 86,709.66
  4. Step 4: Simplify right side
    158,331.48x = 18,945,414,723.03
  5. Step 5: Solve for x
    x = 18,945,414,723.03/158,331.48
  6. Step 6: Final answer
    x = 119,656.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.