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Finding the Fourth Proportional to 89,725.60, 134,442.60 and 84,476.80

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Solution

The fourth proportional to 89,725.60, 134,442.60 and 84,476.80 is: 126,577.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,725.60 : 134,442.60 = 84,476.80 : x
  2. Step 2: Convert to fraction form
    89,725.60/134,442.60 = 84,476.80/x
  3. Step 3: Cross multiply
    89,725.60x = 134,442.60 × 84,476.80
  4. Step 4: Simplify right side
    89,725.60x = 11,357,280,631.68
  5. Step 5: Solve for x
    x = 11,357,280,631.68/89,725.60
  6. Step 6: Final answer
    x = 126,577.93

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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.