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Finding the Fourth Proportional to 158,618.15, 218,894.13 and 86,998.67

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Solution

The fourth proportional to 158,618.15, 218,894.13 and 86,998.67 is: 120,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,618.15 : 218,894.13 = 86,998.67 : x
  2. Step 2: Convert to fraction form
    158,618.15/218,894.13 = 86,998.67/x
  3. Step 3: Cross multiply
    158,618.15x = 218,894.13 × 86,998.67
  4. Step 4: Simplify right side
    158,618.15x = 19,043,497,086.34
  5. Step 5: Solve for x
    x = 19,043,497,086.34/158,618.15
  6. Step 6: Final answer
    x = 120,058.76

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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.