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Finding the Fourth Proportional to 66,539.70, 91,795.32 and 45,021.78

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Solution

The fourth proportional to 66,539.70, 91,795.32 and 45,021.78 is: 62,110.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,539.70 : 91,795.32 = 45,021.78 : x
  2. Step 2: Convert to fraction form
    66,539.70/91,795.32 = 45,021.78/x
  3. Step 3: Cross multiply
    66,539.70x = 91,795.32 × 45,021.78
  4. Step 4: Simplify right side
    66,539.70x = 4,132,788,702.07
  5. Step 5: Solve for x
    x = 4,132,788,702.07/66,539.70
  6. Step 6: Final answer
    x = 62,110.12

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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.