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Finding the Fourth Proportional to 66,138.93, 91,208.57 and 43,497

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Solution

The fourth proportional to 66,138.93, 91,208.57 and 43,497 is: 59,984.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,138.93 : 91,208.57 = 43,497 : x
  2. Step 2: Convert to fraction form
    66,138.93/91,208.57 = 43,497/x
  3. Step 3: Cross multiply
    66,138.93x = 91,208.57 × 43,497
  4. Step 4: Simplify right side
    66,138.93x = 3,967,298,951.81
  5. Step 5: Solve for x
    x = 3,967,298,951.81/66,138.93
  6. Step 6: Final answer
    x = 59,984.32

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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.