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Finding the Fourth Proportional to 72,801.68, 100,449.69 and 40,958.96

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Solution

The fourth proportional to 72,801.68, 100,449.69 and 40,958.96 is: 56,514.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,801.68 : 100,449.69 = 40,958.96 : x
  2. Step 2: Convert to fraction form
    72,801.68/100,449.69 = 40,958.96/x
  3. Step 3: Cross multiply
    72,801.68x = 100,449.69 × 40,958.96
  4. Step 4: Simplify right side
    72,801.68x = 4,114,314,686.00
  5. Step 5: Solve for x
    x = 4,114,314,686.00/72,801.68
  6. Step 6: Final answer
    x = 56,514.01

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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.