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Finding the Fourth Proportional to 136,489.33, 188,255.02 and 90,465.74

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Solution

The fourth proportional to 136,489.33, 188,255.02 and 90,465.74 is: 124,776.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,489.33 : 188,255.02 = 90,465.74 : x
  2. Step 2: Convert to fraction form
    136,489.33/188,255.02 = 90,465.74/x
  3. Step 3: Cross multiply
    136,489.33x = 188,255.02 × 90,465.74
  4. Step 4: Simplify right side
    136,489.33x = 17,030,629,693.01
  5. Step 5: Solve for x
    x = 17,030,629,693.01/136,489.33
  6. Step 6: Final answer
    x = 124,776.27

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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.