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Finding the Fourth Proportional to 207,220.50, 310,830.75 and 66,979.13

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Solution

The fourth proportional to 207,220.50, 310,830.75 and 66,979.13 is: 100,468.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,220.50 : 310,830.75 = 66,979.13 : x
  2. Step 2: Convert to fraction form
    207,220.50/310,830.75 = 66,979.13/x
  3. Step 3: Cross multiply
    207,220.50x = 310,830.75 × 66,979.13
  4. Step 4: Simplify right side
    207,220.50x = 20,819,171,658.09
  5. Step 5: Solve for x
    x = 20,819,171,658.09/207,220.50
  6. Step 6: Final answer
    x = 100,468.69

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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.