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Finding the Fourth Proportional to 136,820.68, 205,231.03 and 99,617.51

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Solution

The fourth proportional to 136,820.68, 205,231.03 and 99,617.51 is: 149,426.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,820.68 : 205,231.03 = 99,617.51 : x
  2. Step 2: Convert to fraction form
    136,820.68/205,231.03 = 99,617.51/x
  3. Step 3: Cross multiply
    136,820.68x = 205,231.03 × 99,617.51
  4. Step 4: Simplify right side
    136,820.68x = 20,444,603,564.04
  5. Step 5: Solve for x
    x = 20,444,603,564.04/136,820.68
  6. Step 6: Final answer
    x = 149,426.26

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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.