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Finding the Fourth Proportional to 69,161.40, 103,742.10 and 42,917.40

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Solution

The fourth proportional to 69,161.40, 103,742.10 and 42,917.40 is: 64,376.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,161.40 : 103,742.10 = 42,917.40 : x
  2. Step 2: Convert to fraction form
    69,161.40/103,742.10 = 42,917.40/x
  3. Step 3: Cross multiply
    69,161.40x = 103,742.10 × 42,917.40
  4. Step 4: Simplify right side
    69,161.40x = 4,452,341,202.54
  5. Step 5: Solve for x
    x = 4,452,341,202.54/69,161.40
  6. Step 6: Final answer
    x = 64,376.10

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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.