Home / 143,407.13-197,906.64-78,879.10

Finding the Fourth Proportional to 143,407.13, 197,906.64 and 78,879.10

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Solution

The fourth proportional to 143,407.13, 197,906.64 and 78,879.10 is: 108,855.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,407.13 : 197,906.64 = 78,879.10 : x
  2. Step 2: Convert to fraction form
    143,407.13/197,906.64 = 78,879.10/x
  3. Step 3: Cross multiply
    143,407.13x = 197,906.64 × 78,879.10
  4. Step 4: Simplify right side
    143,407.13x = 15,610,696,657.69
  5. Step 5: Solve for x
    x = 15,610,696,657.69/143,407.13
  6. Step 6: Final answer
    x = 108,855.79

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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.