Home / 142,220.40-196,262.92-78,562.64

Finding the Fourth Proportional to 142,220.40, 196,262.92 and 78,562.64

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Solution

The fourth proportional to 142,220.40, 196,262.92 and 78,562.64 is: 108,415.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,220.40 : 196,262.92 = 78,562.64 : x
  2. Step 2: Convert to fraction form
    142,220.40/196,262.92 = 78,562.64/x
  3. Step 3: Cross multiply
    142,220.40x = 196,262.92 × 78,562.64
  4. Step 4: Simplify right side
    142,220.40x = 15,418,933,129.31
  5. Step 5: Solve for x
    x = 15,418,933,129.31/142,220.40
  6. Step 6: Final answer
    x = 108,415.76

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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.