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Finding the Fourth Proportional to 66,640.08, 91,963.40 and 38,345.20

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Solution

The fourth proportional to 66,640.08, 91,963.40 and 38,345.20 is: 52,916.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.08 : 91,963.40 = 38,345.20 : x
  2. Step 2: Convert to fraction form
    66,640.08/91,963.40 = 38,345.20/x
  3. Step 3: Cross multiply
    66,640.08x = 91,963.40 × 38,345.20
  4. Step 4: Simplify right side
    66,640.08x = 3,526,354,965.68
  5. Step 5: Solve for x
    x = 3,526,354,965.68/66,640.08
  6. Step 6: Final answer
    x = 52,916.43

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.