Home / 142,145.40-196,163.71-78,487.22

Finding the Fourth Proportional to 142,145.40, 196,163.71 and 78,487.22

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Solution

The fourth proportional to 142,145.40, 196,163.71 and 78,487.22 is: 108,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,145.40 : 196,163.71 = 78,487.22 : x
  2. Step 2: Convert to fraction form
    142,145.40/196,163.71 = 78,487.22/x
  3. Step 3: Cross multiply
    142,145.40x = 196,163.71 × 78,487.22
  4. Step 4: Simplify right side
    142,145.40x = 15,396,344,262.79
  5. Step 5: Solve for x
    x = 15,396,344,262.79/142,145.40
  6. Step 6: Final answer
    x = 108,314.05

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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.