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Finding the Fourth Proportional to 150,170.49, 207,214.81 and 89,728.36

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Solution

The fourth proportional to 150,170.49, 207,214.81 and 89,728.36 is: 123,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,170.49 : 207,214.81 = 89,728.36 : x
  2. Step 2: Convert to fraction form
    150,170.49/207,214.81 = 89,728.36/x
  3. Step 3: Cross multiply
    150,170.49x = 207,214.81 × 89,728.36
  4. Step 4: Simplify right side
    150,170.49x = 18,593,044,326.65
  5. Step 5: Solve for x
    x = 18,593,044,326.65/150,170.49
  6. Step 6: Final answer
    x = 123,812.90

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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.