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Finding the Fourth Proportional to 217,112.83, 299,612.42 and 121,622.94

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Solution

The fourth proportional to 217,112.83, 299,612.42 and 121,622.94 is: 167,837.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,112.83 : 299,612.42 = 121,622.94 : x
  2. Step 2: Convert to fraction form
    217,112.83/299,612.42 = 121,622.94/x
  3. Step 3: Cross multiply
    217,112.83x = 299,612.42 × 121,622.94
  4. Step 4: Simplify right side
    217,112.83x = 36,439,742,772.80
  5. Step 5: Solve for x
    x = 36,439,742,772.80/217,112.83
  6. Step 6: Final answer
    x = 167,837.82

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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.