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Finding the Fourth Proportional to 215,801.64, 323,702.46 and 91,143.72

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Solution

The fourth proportional to 215,801.64, 323,702.46 and 91,143.72 is: 136,715.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,801.64 : 323,702.46 = 91,143.72 : x
  2. Step 2: Convert to fraction form
    215,801.64/323,702.46 = 91,143.72/x
  3. Step 3: Cross multiply
    215,801.64x = 323,702.46 × 91,143.72
  4. Step 4: Simplify right side
    215,801.64x = 29,503,446,377.55
  5. Step 5: Solve for x
    x = 29,503,446,377.55/215,801.64
  6. Step 6: Final answer
    x = 136,715.58

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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.