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Finding the Fourth Proportional to 224,388.90, 309,626.04 and 128,895.59

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Solution

The fourth proportional to 224,388.90, 309,626.04 and 128,895.59 is: 177,858.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,388.90 : 309,626.04 = 128,895.59 : x
  2. Step 2: Convert to fraction form
    224,388.90/309,626.04 = 128,895.59/x
  3. Step 3: Cross multiply
    224,388.90x = 309,626.04 × 128,895.59
  4. Step 4: Simplify right side
    224,388.90x = 39,909,429,557.03
  5. Step 5: Solve for x
    x = 39,909,429,557.03/224,388.90
  6. Step 6: Final answer
    x = 177,858.31

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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.