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Finding the Fourth Proportional to 88,368.60, 132,585.30 and 85,128.60

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Solution

The fourth proportional to 88,368.60, 132,585.30 and 85,128.60 is: 127,724.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,368.60 : 132,585.30 = 85,128.60 : x
  2. Step 2: Convert to fraction form
    88,368.60/132,585.30 = 85,128.60/x
  3. Step 3: Cross multiply
    88,368.60x = 132,585.30 × 85,128.60
  4. Step 4: Simplify right side
    88,368.60x = 11,286,800,969.58
  5. Step 5: Solve for x
    x = 11,286,800,969.58/88,368.60
  6. Step 6: Final answer
    x = 127,724.11

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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.