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Finding the Fourth Proportional to 66,493.32, 91,779.84 and 39,294.60

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Solution

The fourth proportional to 66,493.32, 91,779.84 and 39,294.60 is: 54,237.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,493.32 : 91,779.84 = 39,294.60 : x
  2. Step 2: Convert to fraction form
    66,493.32/91,779.84 = 39,294.60/x
  3. Step 3: Cross multiply
    66,493.32x = 91,779.84 × 39,294.60
  4. Step 4: Simplify right side
    66,493.32x = 3,606,452,100.86
  5. Step 5: Solve for x
    x = 3,606,452,100.86/66,493.32
  6. Step 6: Final answer
    x = 54,237.81

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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.