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Finding the Fourth Proportional to 91,845.60, 137,476.80 and 84,847.20

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Solution

The fourth proportional to 91,845.60, 137,476.80 and 84,847.20 is: 127,001.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,845.60 : 137,476.80 = 84,847.20 : x
  2. Step 2: Convert to fraction form
    91,845.60/137,476.80 = 84,847.20/x
  3. Step 3: Cross multiply
    91,845.60x = 137,476.80 × 84,847.20
  4. Step 4: Simplify right side
    91,845.60x = 11,664,521,544.96
  5. Step 5: Solve for x
    x = 11,664,521,544.96/91,845.60
  6. Step 6: Final answer
    x = 127,001.42

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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.