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Finding the Fourth Proportional to 135,362.60, 186,737.82 and 87,631.40

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Solution

The fourth proportional to 135,362.60, 186,737.82 and 87,631.40 is: 120,890.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,362.60 : 186,737.82 = 87,631.40 : x
  2. Step 2: Convert to fraction form
    135,362.60/186,737.82 = 87,631.40/x
  3. Step 3: Cross multiply
    135,362.60x = 186,737.82 × 87,631.40
  4. Step 4: Simplify right side
    135,362.60x = 16,364,096,599.55
  5. Step 5: Solve for x
    x = 16,364,096,599.55/135,362.60
  6. Step 6: Final answer
    x = 120,890.83

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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.