Home / 66,269.12-91,421.24-39,396.38

Finding the Fourth Proportional to 66,269.12, 91,421.24 and 39,396.38

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Solution

The fourth proportional to 66,269.12, 91,421.24 and 39,396.38 is: 54,349.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,269.12 : 91,421.24 = 39,396.38 : x
  2. Step 2: Convert to fraction form
    66,269.12/91,421.24 = 39,396.38/x
  3. Step 3: Cross multiply
    66,269.12x = 91,421.24 × 39,396.38
  4. Step 4: Simplify right side
    66,269.12x = 3,601,665,911.11
  5. Step 5: Solve for x
    x = 3,601,665,911.11/66,269.12
  6. Step 6: Final answer
    x = 54,349.08

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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.