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Finding the Fourth Proportional to 66,847, 92,248.88 and 39,990.64

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Solution

The fourth proportional to 66,847, 92,248.88 and 39,990.64 is: 55,187.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,847 : 92,248.88 = 39,990.64 : x
  2. Step 2: Convert to fraction form
    66,847/92,248.88 = 39,990.64/x
  3. Step 3: Cross multiply
    66,847x = 92,248.88 × 39,990.64
  4. Step 4: Simplify right side
    66,847x = 3,689,091,750.48
  5. Step 5: Solve for x
    x = 3,689,091,750.48/66,847
  6. Step 6: Final answer
    x = 55,187.10

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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.