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Finding the Fourth Proportional to 69,920.57, 96,483.15 and 39,288.80

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Solution

The fourth proportional to 69,920.57, 96,483.15 and 39,288.80 is: 54,214.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,920.57 : 96,483.15 = 39,288.80 : x
  2. Step 2: Convert to fraction form
    69,920.57/96,483.15 = 39,288.80/x
  3. Step 3: Cross multiply
    69,920.57x = 96,483.15 × 39,288.80
  4. Step 4: Simplify right side
    69,920.57x = 3,790,707,244.02
  5. Step 5: Solve for x
    x = 3,790,707,244.02/69,920.57
  6. Step 6: Final answer
    x = 54,214.48

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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.