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Finding the Fourth Proportional to 72,935.39, 100,650.90 and 39,401.39

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Solution

The fourth proportional to 72,935.39, 100,650.90 and 39,401.39 is: 54,373.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,935.39 : 100,650.90 = 39,401.39 : x
  2. Step 2: Convert to fraction form
    72,935.39/100,650.90 = 39,401.39/x
  3. Step 3: Cross multiply
    72,935.39x = 100,650.90 × 39,401.39
  4. Step 4: Simplify right side
    72,935.39x = 3,965,785,364.75
  5. Step 5: Solve for x
    x = 3,965,785,364.75/72,935.39
  6. Step 6: Final answer
    x = 54,373.95

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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.