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Finding the Fourth Proportional to 189,213.54, 261,101.30 and 104,328.78

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Solution

The fourth proportional to 189,213.54, 261,101.30 and 104,328.78 is: 143,966.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,213.54 : 261,101.30 = 104,328.78 : x
  2. Step 2: Convert to fraction form
    189,213.54/261,101.30 = 104,328.78/x
  3. Step 3: Cross multiply
    189,213.54x = 261,101.30 × 104,328.78
  4. Step 4: Simplify right side
    189,213.54x = 27,240,380,085.41
  5. Step 5: Solve for x
    x = 27,240,380,085.41/189,213.54
  6. Step 6: Final answer
    x = 143,966.34

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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.