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Finding the Fourth Proportional to 66,481.66, 91,703.91 and 45,270.46

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Solution

The fourth proportional to 66,481.66, 91,703.91 and 45,270.46 is: 62,445.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,481.66 : 91,703.91 = 45,270.46 : x
  2. Step 2: Convert to fraction form
    66,481.66/91,703.91 = 45,270.46/x
  3. Step 3: Cross multiply
    66,481.66x = 91,703.91 × 45,270.46
  4. Step 4: Simplify right side
    66,481.66x = 4,151,478,189.50
  5. Step 5: Solve for x
    x = 4,151,478,189.50/66,481.66
  6. Step 6: Final answer
    x = 62,445.47

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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.