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Finding the Fourth Proportional to 217,460.39, 300,085.80 and 131,440.20

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Solution

The fourth proportional to 217,460.39, 300,085.80 and 131,440.20 is: 181,381.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,460.39 : 300,085.80 = 131,440.20 : x
  2. Step 2: Convert to fraction form
    217,460.39/300,085.80 = 131,440.20/x
  3. Step 3: Cross multiply
    217,460.39x = 300,085.80 × 131,440.20
  4. Step 4: Simplify right side
    217,460.39x = 39,443,337,569.16
  5. Step 5: Solve for x
    x = 39,443,337,569.16/217,460.39
  6. Step 6: Final answer
    x = 181,381.71

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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.