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Finding the Fourth Proportional to 69,856.94, 96,399.90 and 39,640.46

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Solution

The fourth proportional to 69,856.94, 96,399.90 and 39,640.46 is: 54,702.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,856.94 : 96,399.90 = 39,640.46 : x
  2. Step 2: Convert to fraction form
    69,856.94/96,399.90 = 39,640.46/x
  3. Step 3: Cross multiply
    69,856.94x = 96,399.90 × 39,640.46
  4. Step 4: Simplify right side
    69,856.94x = 3,821,335,897.95
  5. Step 5: Solve for x
    x = 3,821,335,897.95/69,856.94
  6. Step 6: Final answer
    x = 54,702.31

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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.