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Finding the Fourth Proportional to 217,155.52, 299,686.94 and 121,692.97

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Solution

The fourth proportional to 217,155.52, 299,686.94 and 121,692.97 is: 167,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,155.52 : 299,686.94 = 121,692.97 : x
  2. Step 2: Convert to fraction form
    217,155.52/299,686.94 = 121,692.97/x
  3. Step 3: Cross multiply
    217,155.52x = 299,686.94 × 121,692.97
  4. Step 4: Simplify right side
    217,155.52x = 36,469,793,798.81
  5. Step 5: Solve for x
    x = 36,469,793,798.81/217,155.52
  6. Step 6: Final answer
    x = 167,943.20

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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.