Home / 100,112.81-150,011.14-81,301.31

Finding the Fourth Proportional to 100,112.81, 150,011.14 and 81,301.31

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Solution

The fourth proportional to 100,112.81, 150,011.14 and 81,301.31 is: 121,823.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,112.81 : 150,011.14 = 81,301.31 : x
  2. Step 2: Convert to fraction form
    100,112.81/150,011.14 = 81,301.31/x
  3. Step 3: Cross multiply
    100,112.81x = 150,011.14 × 81,301.31
  4. Step 4: Simplify right side
    100,112.81x = 12,196,102,196.59
  5. Step 5: Solve for x
    x = 12,196,102,196.59/100,112.81
  6. Step 6: Final answer
    x = 121,823.59

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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.