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Finding the Fourth Proportional to 99,515.50, 137,331.40 and 54,803.50

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Solution

The fourth proportional to 99,515.50, 137,331.40 and 54,803.50 is: 75,628.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,515.50 : 137,331.40 = 54,803.50 : x
  2. Step 2: Convert to fraction form
    99,515.50/137,331.40 = 54,803.50/x
  3. Step 3: Cross multiply
    99,515.50x = 137,331.40 × 54,803.50
  4. Step 4: Simplify right side
    99,515.50x = 7,526,241,379.90
  5. Step 5: Solve for x
    x = 7,526,241,379.90/99,515.50
  6. Step 6: Final answer
    x = 75,628.84

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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.