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Finding the Fourth Proportional to 66,078.70, 91,264.28 and 43,518.53

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Solution

The fourth proportional to 66,078.70, 91,264.28 and 43,518.53 is: 60,105.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,078.70 : 91,264.28 = 43,518.53 : x
  2. Step 2: Convert to fraction form
    66,078.70/91,264.28 = 43,518.53/x
  3. Step 3: Cross multiply
    66,078.70x = 91,264.28 × 43,518.53
  4. Step 4: Simplify right side
    66,078.70x = 3,971,687,307.11
  5. Step 5: Solve for x
    x = 3,971,687,307.11/66,078.70
  6. Step 6: Final answer
    x = 60,105.41

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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.