Home / 142,439.52-196,507.12-81,995.68

Finding the Fourth Proportional to 142,439.52, 196,507.12 and 81,995.68

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Solution

The fourth proportional to 142,439.52, 196,507.12 and 81,995.68 is: 113,119.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,439.52 : 196,507.12 = 81,995.68 : x
  2. Step 2: Convert to fraction form
    142,439.52/196,507.12 = 81,995.68/x
  3. Step 3: Cross multiply
    142,439.52x = 196,507.12 × 81,995.68
  4. Step 4: Simplify right side
    142,439.52x = 16,112,734,929.24
  5. Step 5: Solve for x
    x = 16,112,734,929.24/142,439.52
  6. Step 6: Final answer
    x = 113,119.83

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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.