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Finding the Fourth Proportional to 138,200.04, 190,709.04 and 81,600.48

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Solution

The fourth proportional to 138,200.04, 190,709.04 and 81,600.48 is: 112,604.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,200.04 : 190,709.04 = 81,600.48 : x
  2. Step 2: Convert to fraction form
    138,200.04/190,709.04 = 81,600.48/x
  3. Step 3: Cross multiply
    138,200.04x = 190,709.04 × 81,600.48
  4. Step 4: Simplify right side
    138,200.04x = 15,561,949,204.34
  5. Step 5: Solve for x
    x = 15,561,949,204.34/138,200.04
  6. Step 6: Final answer
    x = 112,604.52

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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.