Home / 143,187.11-197,600.65-78,659.06

Finding the Fourth Proportional to 143,187.11, 197,600.65 and 78,659.06

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Solution

The fourth proportional to 143,187.11, 197,600.65 and 78,659.06 is: 108,550.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,187.11 : 197,600.65 = 78,659.06 : x
  2. Step 2: Convert to fraction form
    143,187.11/197,600.65 = 78,659.06/x
  3. Step 3: Cross multiply
    143,187.11x = 197,600.65 × 78,659.06
  4. Step 4: Simplify right side
    143,187.11x = 15,543,081,384.39
  5. Step 5: Solve for x
    x = 15,543,081,384.39/143,187.11
  6. Step 6: Final answer
    x = 108,550.84

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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.