Home / 143,350.83-197,806.86-78,809.40

Finding the Fourth Proportional to 143,350.83, 197,806.86 and 78,809.40

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Solution

The fourth proportional to 143,350.83, 197,806.86 and 78,809.40 is: 108,747.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,350.83 : 197,806.86 = 78,809.40 : x
  2. Step 2: Convert to fraction form
    143,350.83/197,806.86 = 78,809.40/x
  3. Step 3: Cross multiply
    143,350.83x = 197,806.86 × 78,809.40
  4. Step 4: Simplify right side
    143,350.83x = 15,589,039,952.48
  5. Step 5: Solve for x
    x = 15,589,039,952.48/143,350.83
  6. Step 6: Final answer
    x = 108,747.47

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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.