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Finding the Fourth Proportional to 72,651.87, 100,262.16 and 40,820.13

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Solution

The fourth proportional to 72,651.87, 100,262.16 and 40,820.13 is: 56,333.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,651.87 : 100,262.16 = 40,820.13 : x
  2. Step 2: Convert to fraction form
    72,651.87/100,262.16 = 40,820.13/x
  3. Step 3: Cross multiply
    72,651.87x = 100,262.16 × 40,820.13
  4. Step 4: Simplify right side
    72,651.87x = 4,092,714,405.28
  5. Step 5: Solve for x
    x = 4,092,714,405.28/72,651.87
  6. Step 6: Final answer
    x = 56,333.23

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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.