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Finding the Fourth Proportional to 217,575.77, 326,490.72 and 91,206.30

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Solution

The fourth proportional to 217,575.77, 326,490.72 and 91,206.30 is: 136,862.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,575.77 : 326,490.72 = 91,206.30 : x
  2. Step 2: Convert to fraction form
    217,575.77/326,490.72 = 91,206.30/x
  3. Step 3: Cross multiply
    217,575.77x = 326,490.72 × 91,206.30
  4. Step 4: Simplify right side
    217,575.77x = 29,778,012,207.41
  5. Step 5: Solve for x
    x = 29,778,012,207.41/217,575.77
  6. Step 6: Final answer
    x = 136,862.72

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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.