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Finding the Fourth Proportional to 158,811.68, 219,150.30 and 87,191.30

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Solution

The fourth proportional to 158,811.68, 219,150.30 and 87,191.30 is: 120,318.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,811.68 : 219,150.30 = 87,191.30 : x
  2. Step 2: Convert to fraction form
    158,811.68/219,150.30 = 87,191.30/x
  3. Step 3: Cross multiply
    158,811.68x = 219,150.30 × 87,191.30
  4. Step 4: Simplify right side
    158,811.68x = 19,107,999,552.39
  5. Step 5: Solve for x
    x = 19,107,999,552.39/158,811.68
  6. Step 6: Final answer
    x = 120,318.60

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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.