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Finding the Fourth Proportional to 158,196.48, 218,311.50 and 86,581.11

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Solution

The fourth proportional to 158,196.48, 218,311.50 and 86,581.11 is: 119,482.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,196.48 : 218,311.50 = 86,581.11 : x
  2. Step 2: Convert to fraction form
    158,196.48/218,311.50 = 86,581.11/x
  3. Step 3: Cross multiply
    158,196.48x = 218,311.50 × 86,581.11
  4. Step 4: Simplify right side
    158,196.48x = 18,901,651,995.77
  5. Step 5: Solve for x
    x = 18,901,651,995.77/158,196.48
  6. Step 6: Final answer
    x = 119,482.13

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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.