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Finding the Fourth Proportional to 66,515.28, 91,806.12 and 45,303

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Solution

The fourth proportional to 66,515.28, 91,806.12 and 45,303 is: 62,528.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,515.28 : 91,806.12 = 45,303 : x
  2. Step 2: Convert to fraction form
    66,515.28/91,806.12 = 45,303/x
  3. Step 3: Cross multiply
    66,515.28x = 91,806.12 × 45,303
  4. Step 4: Simplify right side
    66,515.28x = 4,159,092,654.36
  5. Step 5: Solve for x
    x = 4,159,092,654.36/66,515.28
  6. Step 6: Final answer
    x = 62,528.38

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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.