Home / 138,864.30-191,631.78-75,200.64

Finding the Fourth Proportional to 138,864.30, 191,631.78 and 75,200.64

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Solution

The fourth proportional to 138,864.30, 191,631.78 and 75,200.64 is: 103,776.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,864.30 : 191,631.78 = 75,200.64 : x
  2. Step 2: Convert to fraction form
    138,864.30/191,631.78 = 75,200.64/x
  3. Step 3: Cross multiply
    138,864.30x = 191,631.78 × 75,200.64
  4. Step 4: Simplify right side
    138,864.30x = 14,410,832,500.34
  5. Step 5: Solve for x
    x = 14,410,832,500.34/138,864.30
  6. Step 6: Final answer
    x = 103,776.37

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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.