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Finding the Fourth Proportional to 69,015.80, 103,421.10 and 35,691.40

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Solution

The fourth proportional to 69,015.80, 103,421.10 and 35,691.40 is: 53,484.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,015.80 : 103,421.10 = 35,691.40 : x
  2. Step 2: Convert to fraction form
    69,015.80/103,421.10 = 35,691.40/x
  3. Step 3: Cross multiply
    69,015.80x = 103,421.10 × 35,691.40
  4. Step 4: Simplify right side
    69,015.80x = 3,691,243,848.54
  5. Step 5: Solve for x
    x = 3,691,243,848.54/69,015.80
  6. Step 6: Final answer
    x = 53,484.04

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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.