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Finding the Fourth Proportional to 217,085.58, 299,589.39 and 121,586.70

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Solution

The fourth proportional to 217,085.58, 299,589.39 and 121,586.70 is: 167,795.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,085.58 : 299,589.39 = 121,586.70 : x
  2. Step 2: Convert to fraction form
    217,085.58/299,589.39 = 121,586.70/x
  3. Step 3: Cross multiply
    217,085.58x = 299,589.39 × 121,586.70
  4. Step 4: Simplify right side
    217,085.58x = 36,426,085,285.11
  5. Step 5: Solve for x
    x = 36,426,085,285.11/217,085.58
  6. Step 6: Final answer
    x = 167,795.97

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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.