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Finding the Fourth Proportional to 217,990.02, 300,823.56 and 122,512.86

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Solution

The fourth proportional to 217,990.02, 300,823.56 and 122,512.86 is: 169,066.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,990.02 : 300,823.56 = 122,512.86 : x
  2. Step 2: Convert to fraction form
    217,990.02/300,823.56 = 122,512.86/x
  3. Step 3: Cross multiply
    217,990.02x = 300,823.56 × 122,512.86
  4. Step 4: Simplify right side
    217,990.02x = 36,854,754,690.98
  5. Step 5: Solve for x
    x = 36,854,754,690.98/217,990.02
  6. Step 6: Final answer
    x = 169,066.25

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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.