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Finding the Fourth Proportional to 217,159.41, 299,688.22 and 121,662.84

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Solution

The fourth proportional to 217,159.41, 299,688.22 and 121,662.84 is: 167,899.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,159.41 : 299,688.22 = 121,662.84 : x
  2. Step 2: Convert to fraction form
    217,159.41/299,688.22 = 121,662.84/x
  3. Step 3: Cross multiply
    217,159.41x = 299,688.22 × 121,662.84
  4. Step 4: Simplify right side
    217,159.41x = 36,460,921,235.65
  5. Step 5: Solve for x
    x = 36,460,921,235.65/217,159.41
  6. Step 6: Final answer
    x = 167,899.34

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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.