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Finding the Fourth Proportional to 217,140.16, 299,670.96 and 121,668.16

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Solution

The fourth proportional to 217,140.16, 299,670.96 and 121,668.16 is: 167,911.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,140.16 : 299,670.96 = 121,668.16 : x
  2. Step 2: Convert to fraction form
    217,140.16/299,670.96 = 121,668.16/x
  3. Step 3: Cross multiply
    217,140.16x = 299,670.96 × 121,668.16
  4. Step 4: Simplify right side
    217,140.16x = 36,460,414,308.63
  5. Step 5: Solve for x
    x = 36,460,414,308.63/217,140.16
  6. Step 6: Final answer
    x = 167,911.89

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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.