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Finding the Fourth Proportional to 217,123.88, 299,630.96 and 121,630.55

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Solution

The fourth proportional to 217,123.88, 299,630.96 and 121,630.55 is: 167,850.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,123.88 : 299,630.96 = 121,630.55 : x
  2. Step 2: Convert to fraction form
    217,123.88/299,630.96 = 121,630.55/x
  3. Step 3: Cross multiply
    217,123.88x = 299,630.96 × 121,630.55
  4. Step 4: Simplify right side
    217,123.88x = 36,444,276,355.52
  5. Step 5: Solve for x
    x = 36,444,276,355.52/217,123.88
  6. Step 6: Final answer
    x = 167,850.16

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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.