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Finding the Fourth Proportional to 100,112.31, 150,010.39 and 81,300.81

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Solution

The fourth proportional to 100,112.31, 150,010.39 and 81,300.81 is: 121,822.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,112.31 : 150,010.39 = 81,300.81 : x
  2. Step 2: Convert to fraction form
    100,112.31/150,010.39 = 81,300.81/x
  3. Step 3: Cross multiply
    100,112.31x = 150,010.39 × 81,300.81
  4. Step 4: Simplify right side
    100,112.31x = 12,195,966,215.42
  5. Step 5: Solve for x
    x = 12,195,966,215.42/100,112.31
  6. Step 6: Final answer
    x = 121,822.84

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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.