Home / 66,778.64-92,145.48-39,915.44

Finding the Fourth Proportional to 66,778.64, 92,145.48 and 39,915.44

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Solution

The fourth proportional to 66,778.64, 92,145.48 and 39,915.44 is: 55,077.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,778.64 : 92,145.48 = 39,915.44 : x
  2. Step 2: Convert to fraction form
    66,778.64/92,145.48 = 39,915.44/x
  3. Step 3: Cross multiply
    66,778.64x = 92,145.48 × 39,915.44
  4. Step 4: Simplify right side
    66,778.64x = 3,678,027,378.21
  5. Step 5: Solve for x
    x = 3,678,027,378.21/66,778.64
  6. Step 6: Final answer
    x = 55,077.90

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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.