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Finding the Fourth Proportional to 70,936.86, 97,891.50 and 38,671.80

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Solution

The fourth proportional to 70,936.86, 97,891.50 and 38,671.80 is: 53,366.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,936.86 : 97,891.50 = 38,671.80 : x
  2. Step 2: Convert to fraction form
    70,936.86/97,891.50 = 38,671.80/x
  3. Step 3: Cross multiply
    70,936.86x = 97,891.50 × 38,671.80
  4. Step 4: Simplify right side
    70,936.86x = 3,785,640,509.70
  5. Step 5: Solve for x
    x = 3,785,640,509.70/70,936.86
  6. Step 6: Final answer
    x = 53,366.34

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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.