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Finding the Fourth Proportional to 158,656.68, 218,949.12 and 87,039.72

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Solution

The fourth proportional to 158,656.68, 218,949.12 and 87,039.72 is: 120,116.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,656.68 : 218,949.12 = 87,039.72 : x
  2. Step 2: Convert to fraction form
    158,656.68/218,949.12 = 87,039.72/x
  3. Step 3: Cross multiply
    158,656.68x = 218,949.12 × 87,039.72
  4. Step 4: Simplify right side
    158,656.68x = 19,057,270,099.05
  5. Step 5: Solve for x
    x = 19,057,270,099.05/158,656.68
  6. Step 6: Final answer
    x = 120,116.41

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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.