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Finding the Fourth Proportional to 72,037.80, 99,415.80 and 40,206.96

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Solution

The fourth proportional to 72,037.80, 99,415.80 and 40,206.96 is: 55,487.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,037.80 : 99,415.80 = 40,206.96 : x
  2. Step 2: Convert to fraction form
    72,037.80/99,415.80 = 40,206.96/x
  3. Step 3: Cross multiply
    72,037.80x = 99,415.80 × 40,206.96
  4. Step 4: Simplify right side
    72,037.80x = 3,997,207,093.97
  5. Step 5: Solve for x
    x = 3,997,207,093.97/72,037.80
  6. Step 6: Final answer
    x = 55,487.63

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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.