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Finding the Fourth Proportional to 135,361.60, 186,736.44 and 87,630.40

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Solution

The fourth proportional to 135,361.60, 186,736.44 and 87,630.40 is: 120,889.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,361.60 : 186,736.44 = 87,630.40 : x
  2. Step 2: Convert to fraction form
    135,361.60/186,736.44 = 87,630.40/x
  3. Step 3: Cross multiply
    135,361.60x = 186,736.44 × 87,630.40
  4. Step 4: Simplify right side
    135,361.60x = 16,363,788,931.78
  5. Step 5: Solve for x
    x = 16,363,788,931.78/135,361.60
  6. Step 6: Final answer
    x = 120,889.45

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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.