Home / 136,921.60-188,945.03-76,480.20

Finding the Fourth Proportional to 136,921.60, 188,945.03 and 76,480.20

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Solution

The fourth proportional to 136,921.60, 188,945.03 and 76,480.20 is: 105,538.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,921.60 : 188,945.03 = 76,480.20 : x
  2. Step 2: Convert to fraction form
    136,921.60/188,945.03 = 76,480.20/x
  3. Step 3: Cross multiply
    136,921.60x = 188,945.03 × 76,480.20
  4. Step 4: Simplify right side
    136,921.60x = 14,450,553,683.41
  5. Step 5: Solve for x
    x = 14,450,553,683.41/136,921.60
  6. Step 6: Final answer
    x = 105,538.89

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1.5x scale

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.