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Finding the Fourth Proportional to 224,392.80, 309,690.85 and 128,917.95

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Solution

The fourth proportional to 224,392.80, 309,690.85 and 128,917.95 is: 177,923.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,392.80 : 309,690.85 = 128,917.95 : x
  2. Step 2: Convert to fraction form
    224,392.80/309,690.85 = 128,917.95/x
  3. Step 3: Cross multiply
    224,392.80x = 309,690.85 × 128,917.95
  4. Step 4: Simplify right side
    224,392.80x = 39,924,709,515.76
  5. Step 5: Solve for x
    x = 39,924,709,515.76/224,392.80
  6. Step 6: Final answer
    x = 177,923.31

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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.