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Finding the Fourth Proportional to 69,664.64, 96,143.20 and 39,455.30

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Solution

The fourth proportional to 69,664.64, 96,143.20 and 39,455.30 is: 54,451.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,664.64 : 96,143.20 = 39,455.30 : x
  2. Step 2: Convert to fraction form
    69,664.64/96,143.20 = 39,455.30/x
  3. Step 3: Cross multiply
    69,664.64x = 96,143.20 × 39,455.30
  4. Step 4: Simplify right side
    69,664.64x = 3,793,358,798.96
  5. Step 5: Solve for x
    x = 3,793,358,798.96/69,664.64
  6. Step 6: Final answer
    x = 54,451.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.