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Finding the Fourth Proportional to 331,076.16, 496,614.40 and 81,758.40

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Solution

The fourth proportional to 331,076.16, 496,614.40 and 81,758.40 is: 122,637.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,076.16 : 496,614.40 = 81,758.40 : x
  2. Step 2: Convert to fraction form
    331,076.16/496,614.40 = 81,758.40/x
  3. Step 3: Cross multiply
    331,076.16x = 496,614.40 × 81,758.40
  4. Step 4: Simplify right side
    331,076.16x = 40,602,398,760.96
  5. Step 5: Solve for x
    x = 40,602,398,760.96/331,076.16
  6. Step 6: Final answer
    x = 122,637.64

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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.