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Finding the Fourth Proportional to 100,449.06, 150,701.61 and 81,904.21

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Solution

The fourth proportional to 100,449.06, 150,701.61 and 81,904.21 is: 122,879.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,449.06 : 150,701.61 = 81,904.21 : x
  2. Step 2: Convert to fraction form
    100,449.06/150,701.61 = 81,904.21/x
  3. Step 3: Cross multiply
    100,449.06x = 150,701.61 × 81,904.21
  4. Step 4: Simplify right side
    100,449.06x = 12,343,097,090.86
  5. Step 5: Solve for x
    x = 12,343,097,090.86/100,449.06
  6. Step 6: Final answer
    x = 122,879.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.