Home / 69,140.64-103,691.48-19,209.38

Finding the Fourth Proportional to 69,140.64, 103,691.48 and 19,209.38

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Solution

The fourth proportional to 69,140.64, 103,691.48 and 19,209.38 is: 28,808.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,140.64 : 103,691.48 = 19,209.38 : x
  2. Step 2: Convert to fraction form
    69,140.64/103,691.48 = 19,209.38/x
  3. Step 3: Cross multiply
    69,140.64x = 103,691.48 × 19,209.38
  4. Step 4: Simplify right side
    69,140.64x = 1,991,848,800.25
  5. Step 5: Solve for x
    x = 1,991,848,800.25/69,140.64
  6. Step 6: Final answer
    x = 28,808.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.