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Finding the Fourth Proportional to 35,397.80, 53,139.90 and 35,138.60

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Solution

The fourth proportional to 35,397.80, 53,139.90 and 35,138.60 is: 52,750.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,397.80 : 53,139.90 = 35,138.60 : x
  2. Step 2: Convert to fraction form
    35,397.80/53,139.90 = 35,138.60/x
  3. Step 3: Cross multiply
    35,397.80x = 53,139.90 × 35,138.60
  4. Step 4: Simplify right side
    35,397.80x = 1,867,261,690.14
  5. Step 5: Solve for x
    x = 1,867,261,690.14/35,397.80
  6. Step 6: Final answer
    x = 52,750.78

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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.