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Finding the Fourth Proportional to 66,671.98, 92,012.16 and 39,815.62

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Solution

The fourth proportional to 66,671.98, 92,012.16 and 39,815.62 is: 54,948.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,671.98 : 92,012.16 = 39,815.62 : x
  2. Step 2: Convert to fraction form
    66,671.98/92,012.16 = 39,815.62/x
  3. Step 3: Cross multiply
    66,671.98x = 92,012.16 × 39,815.62
  4. Step 4: Simplify right side
    66,671.98x = 3,663,521,197.94
  5. Step 5: Solve for x
    x = 3,663,521,197.94/66,671.98
  6. Step 6: Final answer
    x = 54,948.44

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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.