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Finding the Fourth Proportional to 89,355.60, 134,033.40 and 74,921.40

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Solution

The fourth proportional to 89,355.60, 134,033.40 and 74,921.40 is: 112,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,355.60 : 134,033.40 = 74,921.40 : x
  2. Step 2: Convert to fraction form
    89,355.60/134,033.40 = 74,921.40/x
  3. Step 3: Cross multiply
    89,355.60x = 134,033.40 × 74,921.40
  4. Step 4: Simplify right side
    89,355.60x = 10,041,969,974.76
  5. Step 5: Solve for x
    x = 10,041,969,974.76/89,355.60
  6. Step 6: Final answer
    x = 112,382.10

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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.