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Finding the Fourth Proportional to 100,353.92, 138,487.27 and 57,911.54

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Solution

The fourth proportional to 100,353.92, 138,487.27 and 57,911.54 is: 79,917.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,353.92 : 138,487.27 = 57,911.54 : x
  2. Step 2: Convert to fraction form
    100,353.92/138,487.27 = 57,911.54/x
  3. Step 3: Cross multiply
    100,353.92x = 138,487.27 × 57,911.54
  4. Step 4: Simplify right side
    100,353.92x = 8,020,011,076.10
  5. Step 5: Solve for x
    x = 8,020,011,076.10/100,353.92
  6. Step 6: Final answer
    x = 79,917.27

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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.