Home / 142,239.08-196,289.32-78,576.88

Finding the Fourth Proportional to 142,239.08, 196,289.32 and 78,576.88

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Solution

The fourth proportional to 142,239.08, 196,289.32 and 78,576.88 is: 108,435.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,239.08 : 196,289.32 = 78,576.88 : x
  2. Step 2: Convert to fraction form
    142,239.08/196,289.32 = 78,576.88/x
  3. Step 3: Cross multiply
    142,239.08x = 196,289.32 × 78,576.88
  4. Step 4: Simplify right side
    142,239.08x = 15,423,802,342.92
  5. Step 5: Solve for x
    x = 15,423,802,342.92/142,239.08
  6. Step 6: Final answer
    x = 108,435.76

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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.