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Finding the Fourth Proportional to 217,123.38, 299,630.27 and 121,630.05

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Solution

The fourth proportional to 217,123.38, 299,630.27 and 121,630.05 is: 167,849.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,123.38 : 299,630.27 = 121,630.05 : x
  2. Step 2: Convert to fraction form
    217,123.38/299,630.27 = 121,630.05/x
  3. Step 3: Cross multiply
    217,123.38x = 299,630.27 × 121,630.05
  4. Step 4: Simplify right side
    217,123.38x = 36,444,044,721.61
  5. Step 5: Solve for x
    x = 36,444,044,721.61/217,123.38
  6. Step 6: Final answer
    x = 167,849.47

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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.