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Finding the Fourth Proportional to 224,390.30, 309,687.40 and 128,915.45

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Solution

The fourth proportional to 224,390.30, 309,687.40 and 128,915.45 is: 177,919.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,390.30 : 309,687.40 = 128,915.45 : x
  2. Step 2: Convert to fraction form
    224,390.30/309,687.40 = 128,915.45/x
  3. Step 3: Cross multiply
    224,390.30x = 309,687.40 × 128,915.45
  4. Step 4: Simplify right side
    224,390.30x = 39,923,490,304.37
  5. Step 5: Solve for x
    x = 39,923,490,304.37/224,390.30
  6. Step 6: Final answer
    x = 177,919.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.