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Finding the Fourth Proportional to 66,685.44, 92,028.64 and 38,390.88

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Solution

The fourth proportional to 66,685.44, 92,028.64 and 38,390.88 is: 52,980.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,685.44 : 92,028.64 = 38,390.88 : x
  2. Step 2: Convert to fraction form
    66,685.44/92,028.64 = 38,390.88/x
  3. Step 3: Cross multiply
    66,685.44x = 92,028.64 × 38,390.88
  4. Step 4: Simplify right side
    66,685.44x = 3,533,060,474.80
  5. Step 5: Solve for x
    x = 3,533,060,474.80/66,685.44
  6. Step 6: Final answer
    x = 52,980.99

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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.