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Finding the Fourth Proportional to 66,931.74, 92,361.78 and 36,711

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Solution

The fourth proportional to 66,931.74, 92,361.78 and 36,711 is: 50,658.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,931.74 : 92,361.78 = 36,711 : x
  2. Step 2: Convert to fraction form
    66,931.74/92,361.78 = 36,711/x
  3. Step 3: Cross multiply
    66,931.74x = 92,361.78 × 36,711
  4. Step 4: Simplify right side
    66,931.74x = 3,390,693,305.58
  5. Step 5: Solve for x
    x = 3,390,693,305.58/66,931.74
  6. Step 6: Final answer
    x = 50,658.97

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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.