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Finding the Fourth Proportional to 72,957.96, 100,682.06 and 39,423.96

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Solution

The fourth proportional to 72,957.96, 100,682.06 and 39,423.96 is: 54,405.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,957.96 : 100,682.06 = 39,423.96 : x
  2. Step 2: Convert to fraction form
    72,957.96/100,682.06 = 39,423.96/x
  3. Step 3: Cross multiply
    72,957.96x = 100,682.06 × 39,423.96
  4. Step 4: Simplify right side
    72,957.96x = 3,969,285,309.04
  5. Step 5: Solve for x
    x = 3,969,285,309.04/72,957.96
  6. Step 6: Final answer
    x = 54,405.10

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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.