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Finding the Fourth Proportional to 89,858.40, 134,787.60 and 72,362.40

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Solution

The fourth proportional to 89,858.40, 134,787.60 and 72,362.40 is: 108,543.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,858.40 : 134,787.60 = 72,362.40 : x
  2. Step 2: Convert to fraction form
    89,858.40/134,787.60 = 72,362.40/x
  3. Step 3: Cross multiply
    89,858.40x = 134,787.60 × 72,362.40
  4. Step 4: Simplify right side
    89,858.40x = 9,753,554,226.24
  5. Step 5: Solve for x
    x = 9,753,554,226.24/89,858.40
  6. Step 6: Final answer
    x = 108,543.60

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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.