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Finding the Fourth Proportional to 221,533.72, 305,712.60 and 126,038.36

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Solution

The fourth proportional to 221,533.72, 305,712.60 and 126,038.36 is: 173,930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,533.72 : 305,712.60 = 126,038.36 : x
  2. Step 2: Convert to fraction form
    221,533.72/305,712.60 = 126,038.36/x
  3. Step 3: Cross multiply
    221,533.72x = 305,712.60 × 126,038.36
  4. Step 4: Simplify right side
    221,533.72x = 38,531,514,735.34
  5. Step 5: Solve for x
    x = 38,531,514,735.34/221,533.72
  6. Step 6: Final answer
    x = 173,930.70

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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.