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Finding the Fourth Proportional to 72,910.76, 100,616.86 and 39,376.76

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Solution

The fourth proportional to 72,910.76, 100,616.86 and 39,376.76 is: 54,339.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,910.76 : 100,616.86 = 39,376.76 : x
  2. Step 2: Convert to fraction form
    72,910.76/100,616.86 = 39,376.76/x
  3. Step 3: Cross multiply
    72,910.76x = 100,616.86 × 39,376.76
  4. Step 4: Simplify right side
    72,910.76x = 3,961,965,666.55
  5. Step 5: Solve for x
    x = 3,961,965,666.55/72,910.76
  6. Step 6: Final answer
    x = 54,339.93

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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.