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Finding the Fourth Proportional to 217,398.48, 300,005.20 and 121,903.08

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Solution

The fourth proportional to 217,398.48, 300,005.20 and 121,903.08 is: 168,223.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,398.48 : 300,005.20 = 121,903.08 : x
  2. Step 2: Convert to fraction form
    217,398.48/300,005.20 = 121,903.08/x
  3. Step 3: Cross multiply
    217,398.48x = 300,005.20 × 121,903.08
  4. Step 4: Simplify right side
    217,398.48x = 36,571,557,896.02
  5. Step 5: Solve for x
    x = 36,571,557,896.02/217,398.48
  6. Step 6: Final answer
    x = 168,223.61

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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.