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Finding the Fourth Proportional to 223,944.70, 309,038.34 and 128,445.30

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Solution

The fourth proportional to 223,944.70, 309,038.34 and 128,445.30 is: 177,251.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,944.70 : 309,038.34 = 128,445.30 : x
  2. Step 2: Convert to fraction form
    223,944.70/309,038.34 = 128,445.30/x
  3. Step 3: Cross multiply
    223,944.70x = 309,038.34 × 128,445.30
  4. Step 4: Simplify right side
    223,944.70x = 39,694,522,292.80
  5. Step 5: Solve for x
    x = 39,694,522,292.80/223,944.70
  6. Step 6: Final answer
    x = 177,251.45

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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.