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Finding the Fourth Proportional to 217,344.32, 299,968.80 and 121,889.60

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Solution

The fourth proportional to 217,344.32, 299,968.80 and 121,889.60 is: 168,226.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,344.32 : 299,968.80 = 121,889.60 : x
  2. Step 2: Convert to fraction form
    217,344.32/299,968.80 = 121,889.60/x
  3. Step 3: Cross multiply
    217,344.32x = 299,968.80 × 121,889.60
  4. Step 4: Simplify right side
    217,344.32x = 36,563,077,044.48
  5. Step 5: Solve for x
    x = 36,563,077,044.48/217,344.32
  6. Step 6: Final answer
    x = 168,226.51

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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.