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Finding the Fourth Proportional to 72,616.50, 100,203.33 and 40,789.14

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Solution

The fourth proportional to 72,616.50, 100,203.33 and 40,789.14 is: 56,284.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,616.50 : 100,203.33 = 40,789.14 : x
  2. Step 2: Convert to fraction form
    72,616.50/100,203.33 = 40,789.14/x
  3. Step 3: Cross multiply
    72,616.50x = 100,203.33 × 40,789.14
  4. Step 4: Simplify right side
    72,616.50x = 4,087,207,655.84
  5. Step 5: Solve for x
    x = 4,087,207,655.84/72,616.50
  6. Step 6: Final answer
    x = 56,284.83

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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.