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Finding the Fourth Proportional to 217,121.40, 325,638.90 and 104,801.40

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Solution

The fourth proportional to 217,121.40, 325,638.90 and 104,801.40 is: 157,181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,121.40 : 325,638.90 = 104,801.40 : x
  2. Step 2: Convert to fraction form
    217,121.40/325,638.90 = 104,801.40/x
  3. Step 3: Cross multiply
    217,121.40x = 325,638.90 × 104,801.40
  4. Step 4: Simplify right side
    217,121.40x = 34,127,412,614.46
  5. Step 5: Solve for x
    x = 34,127,412,614.46/217,121.40
  6. Step 6: Final answer
    x = 157,181.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.