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Finding the Fourth Proportional to 72,672.47, 100,296.32 and 40,410.30

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Solution

The fourth proportional to 72,672.47, 100,296.32 and 40,410.30 is: 55,770.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,672.47 : 100,296.32 = 40,410.30 : x
  2. Step 2: Convert to fraction form
    72,672.47/100,296.32 = 40,410.30/x
  3. Step 3: Cross multiply
    72,672.47x = 100,296.32 × 40,410.30
  4. Step 4: Simplify right side
    72,672.47x = 4,053,004,178.04
  5. Step 5: Solve for x
    x = 4,053,004,178.04/72,672.47
  6. Step 6: Final answer
    x = 55,770.84

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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.