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Finding the Fourth Proportional to 69,243.60, 103,980.60 and 38,101.20

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Solution

The fourth proportional to 69,243.60, 103,980.60 and 38,101.20 is: 57,215.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,243.60 : 103,980.60 = 38,101.20 : x
  2. Step 2: Convert to fraction form
    69,243.60/103,980.60 = 38,101.20/x
  3. Step 3: Cross multiply
    69,243.60x = 103,980.60 × 38,101.20
  4. Step 4: Simplify right side
    69,243.60x = 3,961,785,636.72
  5. Step 5: Solve for x
    x = 3,961,785,636.72/69,243.60
  6. Step 6: Final answer
    x = 57,215.19

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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.