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Finding the Fourth Proportional to 66,605.73, 91,872.33 and 39,730.23

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Solution

The fourth proportional to 66,605.73, 91,872.33 and 39,730.23 is: 54,801.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.73 : 91,872.33 = 39,730.23 : x
  2. Step 2: Convert to fraction form
    66,605.73/91,872.33 = 39,730.23/x
  3. Step 3: Cross multiply
    66,605.73x = 91,872.33 × 39,730.23
  4. Step 4: Simplify right side
    66,605.73x = 3,650,108,652.55
  5. Step 5: Solve for x
    x = 3,650,108,652.55/66,605.73
  6. Step 6: Final answer
    x = 54,801.72

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1.5x scale

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.