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Finding the Fourth Proportional to 66,691.63, 92,020.89 and 39,824.34

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Solution

The fourth proportional to 66,691.63, 92,020.89 and 39,824.34 is: 54,949.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,691.63 : 92,020.89 = 39,824.34 : x
  2. Step 2: Convert to fraction form
    66,691.63/92,020.89 = 39,824.34/x
  3. Step 3: Cross multiply
    66,691.63x = 92,020.89 × 39,824.34
  4. Step 4: Simplify right side
    66,691.63x = 3,664,671,210.46
  5. Step 5: Solve for x
    x = 3,664,671,210.46/66,691.63
  6. Step 6: Final answer
    x = 54,949.49

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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.