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Finding the Fourth Proportional to 66,837, 92,235.08 and 39,980.64

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Solution

The fourth proportional to 66,837, 92,235.08 and 39,980.64 is: 55,173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,837 : 92,235.08 = 39,980.64 : x
  2. Step 2: Convert to fraction form
    66,837/92,235.08 = 39,980.64/x
  3. Step 3: Cross multiply
    66,837x = 92,235.08 × 39,980.64
  4. Step 4: Simplify right side
    66,837x = 3,687,617,528.85
  5. Step 5: Solve for x
    x = 3,687,617,528.85/66,837
  6. Step 6: Final answer
    x = 55,173.30

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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.