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Finding the Fourth Proportional to 135,355.62, 186,809.85 and 78,785.22

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Solution

The fourth proportional to 135,355.62, 186,809.85 and 78,785.22 is: 108,734.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,355.62 : 186,809.85 = 78,785.22 : x
  2. Step 2: Convert to fraction form
    135,355.62/186,809.85 = 78,785.22/x
  3. Step 3: Cross multiply
    135,355.62x = 186,809.85 × 78,785.22
  4. Step 4: Simplify right side
    135,355.62x = 14,717,855,130.42
  5. Step 5: Solve for x
    x = 14,717,855,130.42/135,355.62
  6. Step 6: Final answer
    x = 108,734.72

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.