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Finding the Fourth Proportional to 224,082.63, 309,215.00 and 128,587.28

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Solution

The fourth proportional to 224,082.63, 309,215.00 and 128,587.28 is: 177,439.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,082.63 : 309,215.00 = 128,587.28 : x
  2. Step 2: Convert to fraction form
    224,082.63/309,215.00 = 128,587.28/x
  3. Step 3: Cross multiply
    224,082.63x = 309,215.00 × 128,587.28
  4. Step 4: Simplify right side
    224,082.63x = 39,761,114,560.59
  5. Step 5: Solve for x
    x = 39,761,114,560.59/224,082.63
  6. Step 6: Final answer
    x = 177,439.52

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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.