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Finding the Fourth Proportional to 66,690.60, 92,045.34 and 42,847.08

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Solution

The fourth proportional to 66,690.60, 92,045.34 and 42,847.08 is: 59,136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,690.60 : 92,045.34 = 42,847.08 : x
  2. Step 2: Convert to fraction form
    66,690.60/92,045.34 = 42,847.08/x
  3. Step 3: Cross multiply
    66,690.60x = 92,045.34 × 42,847.08
  4. Step 4: Simplify right side
    66,690.60x = 3,943,874,046.61
  5. Step 5: Solve for x
    x = 3,943,874,046.61/66,690.60
  6. Step 6: Final answer
    x = 59,136.88

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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.