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Finding the Fourth Proportional to 69,003.70, 103,432.65 and 39,357.70

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Solution

The fourth proportional to 69,003.70, 103,432.65 and 39,357.70 is: 58,994.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,003.70 : 103,432.65 = 39,357.70 : x
  2. Step 2: Convert to fraction form
    69,003.70/103,432.65 = 39,357.70/x
  3. Step 3: Cross multiply
    69,003.70x = 103,432.65 × 39,357.70
  4. Step 4: Simplify right side
    69,003.70x = 4,070,871,208.91
  5. Step 5: Solve for x
    x = 4,070,871,208.91/69,003.70
  6. Step 6: Final answer
    x = 58,994.97

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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.