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Finding the Fourth Proportional to 170,640.40, 255,634.20 and 91,728.40

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Solution

The fourth proportional to 170,640.40, 255,634.20 and 91,728.40 is: 137,417.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,640.40 : 255,634.20 = 91,728.40 : x
  2. Step 2: Convert to fraction form
    170,640.40/255,634.20 = 91,728.40/x
  3. Step 3: Cross multiply
    170,640.40x = 255,634.20 × 91,728.40
  4. Step 4: Simplify right side
    170,640.40x = 23,448,916,151.28
  5. Step 5: Solve for x
    x = 23,448,916,151.28/170,640.40
  6. Step 6: Final answer
    x = 137,417.14

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1.5x scale

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.