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Finding the Fourth Proportional to 217,392.80, 300,002.10 and 121,899.53

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Solution

The fourth proportional to 217,392.80, 300,002.10 and 121,899.53 is: 168,221.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,392.80 : 300,002.10 = 121,899.53 : x
  2. Step 2: Convert to fraction form
    217,392.80/300,002.10 = 121,899.53/x
  3. Step 3: Cross multiply
    217,392.80x = 300,002.10 × 121,899.53
  4. Step 4: Simplify right side
    217,392.80x = 36,570,115,281.90
  5. Step 5: Solve for x
    x = 36,570,115,281.90/217,392.80
  6. Step 6: Final answer
    x = 168,221.38

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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.