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Finding the Fourth Proportional to 72,118.92, 99,523.86 and 39,852.64

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Solution

The fourth proportional to 72,118.92, 99,523.86 and 39,852.64 is: 54,996.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,118.92 : 99,523.86 = 39,852.64 : x
  2. Step 2: Convert to fraction form
    72,118.92/99,523.86 = 39,852.64/x
  3. Step 3: Cross multiply
    72,118.92x = 99,523.86 × 39,852.64
  4. Step 4: Simplify right side
    72,118.92x = 3,966,288,563.99
  5. Step 5: Solve for x
    x = 3,966,288,563.99/72,118.92
  6. Step 6: Final answer
    x = 54,996.51

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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.