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Finding the Fourth Proportional to 217,671.65, 300,449.69 and 131,630.75

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Solution

The fourth proportional to 217,671.65, 300,449.69 and 131,630.75 is: 181,688.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,671.65 : 300,449.69 = 131,630.75 : x
  2. Step 2: Convert to fraction form
    217,671.65/300,449.69 = 131,630.75/x
  3. Step 3: Cross multiply
    217,671.65x = 300,449.69 × 131,630.75
  4. Step 4: Simplify right side
    217,671.65x = 39,548,417,373.81
  5. Step 5: Solve for x
    x = 39,548,417,373.81/217,671.65
  6. Step 6: Final answer
    x = 181,688.42

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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.