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Finding the Fourth Proportional to 66,779.28, 92,149.92 and 38,486.88

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Solution

The fourth proportional to 66,779.28, 92,149.92 and 38,486.88 is: 53,108.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,779.28 : 92,149.92 = 38,486.88 : x
  2. Step 2: Convert to fraction form
    66,779.28/92,149.92 = 38,486.88/x
  3. Step 3: Cross multiply
    66,779.28x = 92,149.92 × 38,486.88
  4. Step 4: Simplify right side
    66,779.28x = 3,546,562,913.05
  5. Step 5: Solve for x
    x = 3,546,562,913.05/66,779.28
  6. Step 6: Final answer
    x = 53,108.73

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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.