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Finding the Fourth Proportional to 215,754.80, 323,459.40 and 90,993.20

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Solution

The fourth proportional to 215,754.80, 323,459.40 and 90,993.20 is: 136,416.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,754.80 : 323,459.40 = 90,993.20 : x
  2. Step 2: Convert to fraction form
    215,754.80/323,459.40 = 90,993.20/x
  3. Step 3: Cross multiply
    215,754.80x = 323,459.40 × 90,993.20
  4. Step 4: Simplify right side
    215,754.80x = 29,432,605,876.08
  5. Step 5: Solve for x
    x = 29,432,605,876.08/215,754.80
  6. Step 6: Final answer
    x = 136,416.92

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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.