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Finding the Fourth Proportional to 224,393.88, 309,632.89 and 128,900.55

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Solution

The fourth proportional to 224,393.88, 309,632.89 and 128,900.55 is: 177,865.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,393.88 : 309,632.89 = 128,900.55 : x
  2. Step 2: Convert to fraction form
    224,393.88/309,632.89 = 128,900.55/x
  3. Step 3: Cross multiply
    224,393.88x = 309,632.89 × 128,900.55
  4. Step 4: Simplify right side
    224,393.88x = 39,911,849,819.09
  5. Step 5: Solve for x
    x = 39,911,849,819.09/224,393.88
  6. Step 6: Final answer
    x = 177,865.14

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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.