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Finding the Fourth Proportional to 69,036.20, 103,481.40 and 39,390.20

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Solution

The fourth proportional to 69,036.20, 103,481.40 and 39,390.20 is: 59,043.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,036.20 : 103,481.40 = 39,390.20 : x
  2. Step 2: Convert to fraction form
    69,036.20/103,481.40 = 39,390.20/x
  3. Step 3: Cross multiply
    69,036.20x = 103,481.40 × 39,390.20
  4. Step 4: Simplify right side
    69,036.20x = 4,076,153,042.28
  5. Step 5: Solve for x
    x = 4,076,153,042.28/69,036.20
  6. Step 6: Final answer
    x = 59,043.71

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1.5x scale

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.