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Finding the Fourth Proportional to 66,891.85, 92,312.51 and 37,817.90

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Solution

The fourth proportional to 66,891.85, 92,312.51 and 37,817.90 is: 52,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,891.85 : 92,312.51 = 37,817.90 : x
  2. Step 2: Convert to fraction form
    66,891.85/92,312.51 = 37,817.90/x
  3. Step 3: Cross multiply
    66,891.85x = 92,312.51 × 37,817.90
  4. Step 4: Simplify right side
    66,891.85x = 3,491,065,271.93
  5. Step 5: Solve for x
    x = 3,491,065,271.93/66,891.85
  6. Step 6: Final answer
    x = 52,189.70

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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.