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Finding the Fourth Proportional to 78,756.66, 118,118.88 and 22,581.72

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Solution

The fourth proportional to 78,756.66, 118,118.88 and 22,581.72 is: 33,867.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756.66 : 118,118.88 = 22,581.72 : x
  2. Step 2: Convert to fraction form
    78,756.66/118,118.88 = 22,581.72/x
  3. Step 3: Cross multiply
    78,756.66x = 118,118.88 × 22,581.72
  4. Step 4: Simplify right side
    78,756.66x = 2,667,327,474.87
  5. Step 5: Solve for x
    x = 2,667,327,474.87/78,756.66
  6. Step 6: Final answer
    x = 33,867.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.