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Finding the Fourth Proportional to 66,503.31, 99,755.07 and 53,260.53

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Solution

The fourth proportional to 66,503.31, 99,755.07 and 53,260.53 is: 79,890.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,503.31 : 99,755.07 = 53,260.53 : x
  2. Step 2: Convert to fraction form
    66,503.31/99,755.07 = 53,260.53/x
  3. Step 3: Cross multiply
    66,503.31x = 99,755.07 × 53,260.53
  4. Step 4: Simplify right side
    66,503.31x = 5,313,008,054.53
  5. Step 5: Solve for x
    x = 5,313,008,054.53/66,503.31
  6. Step 6: Final answer
    x = 79,890.89

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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.