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Finding the Fourth Proportional to 217,507.86, 300,159 and 122,012.46

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Solution

The fourth proportional to 217,507.86, 300,159 and 122,012.46 is: 168,376.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,507.86 : 300,159 = 122,012.46 : x
  2. Step 2: Convert to fraction form
    217,507.86/300,159 = 122,012.46/x
  3. Step 3: Cross multiply
    217,507.86x = 300,159 × 122,012.46
  4. Step 4: Simplify right side
    217,507.86x = 36,623,137,981.14
  5. Step 5: Solve for x
    x = 36,623,137,981.14/217,507.86
  6. Step 6: Final answer
    x = 168,376.16

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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.