Home / 215,931.16-323,943.15-66,181.78

Finding the Fourth Proportional to 215,931.16, 323,943.15 and 66,181.78

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Solution

The fourth proportional to 215,931.16, 323,943.15 and 66,181.78 is: 99,286.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,931.16 : 323,943.15 = 66,181.78 : x
  2. Step 2: Convert to fraction form
    215,931.16/323,943.15 = 66,181.78/x
  3. Step 3: Cross multiply
    215,931.16x = 323,943.15 × 66,181.78
  4. Step 4: Simplify right side
    215,931.16x = 21,439,134,285.81
  5. Step 5: Solve for x
    x = 21,439,134,285.81/215,931.16
  6. Step 6: Final answer
    x = 99,286.89

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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.