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Finding the Fourth Proportional to 66,513.02, 91,789.90 and 36,300.28

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Solution

The fourth proportional to 66,513.02, 91,789.90 and 36,300.28 is: 50,095.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,513.02 : 91,789.90 = 36,300.28 : x
  2. Step 2: Convert to fraction form
    66,513.02/91,789.90 = 36,300.28/x
  3. Step 3: Cross multiply
    66,513.02x = 91,789.90 × 36,300.28
  4. Step 4: Simplify right side
    66,513.02x = 3,331,999,071.17
  5. Step 5: Solve for x
    x = 3,331,999,071.17/66,513.02
  6. Step 6: Final answer
    x = 50,095.44

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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.