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Finding the Fourth Proportional to 91,898.87, 126,805.55 and 57,439.53

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Solution

The fourth proportional to 91,898.87, 126,805.55 and 57,439.53 is: 79,257.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,898.87 : 126,805.55 = 57,439.53 : x
  2. Step 2: Convert to fraction form
    91,898.87/126,805.55 = 57,439.53/x
  3. Step 3: Cross multiply
    91,898.87x = 126,805.55 × 57,439.53
  4. Step 4: Simplify right side
    91,898.87x = 7,283,650,906.19
  5. Step 5: Solve for x
    x = 7,283,650,906.19/91,898.87
  6. Step 6: Final answer
    x = 79,257.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.