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Finding the Fourth Proportional to 136,703.90, 188,628.75 and 91,309.07

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Solution

The fourth proportional to 136,703.90, 188,628.75 and 91,309.07 is: 125,991.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,703.90 : 188,628.75 = 91,309.07 : x
  2. Step 2: Convert to fraction form
    136,703.90/188,628.75 = 91,309.07/x
  3. Step 3: Cross multiply
    136,703.90x = 188,628.75 × 91,309.07
  4. Step 4: Simplify right side
    136,703.90x = 17,223,516,209.33
  5. Step 5: Solve for x
    x = 17,223,516,209.33/136,703.90
  6. Step 6: Final answer
    x = 125,991.40

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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.