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Finding the Fourth Proportional to 224,212.40, 309,400.74 and 128,712.84

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Solution

The fourth proportional to 224,212.40, 309,400.74 and 128,712.84 is: 177,616.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,212.40 : 309,400.74 = 128,712.84 : x
  2. Step 2: Convert to fraction form
    224,212.40/309,400.74 = 128,712.84/x
  3. Step 3: Cross multiply
    224,212.40x = 309,400.74 × 128,712.84
  4. Step 4: Simplify right side
    224,212.40x = 39,823,847,943.50
  5. Step 5: Solve for x
    x = 39,823,847,943.50/224,212.40
  6. Step 6: Final answer
    x = 177,616.62

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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.