Home / 217,140.81-299,647.07-120,340.55

Finding the Fourth Proportional to 217,140.81, 299,647.07 and 120,340.55

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Solution

The fourth proportional to 217,140.81, 299,647.07 and 120,340.55 is: 166,065.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,140.81 : 299,647.07 = 120,340.55 : x
  2. Step 2: Convert to fraction form
    217,140.81/299,647.07 = 120,340.55/x
  3. Step 3: Cross multiply
    217,140.81x = 299,647.07 × 120,340.55
  4. Step 4: Simplify right side
    217,140.81x = 36,059,691,711.45
  5. Step 5: Solve for x
    x = 36,059,691,711.45/217,140.81
  6. Step 6: Final answer
    x = 166,065.94

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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.