Home / 142,110.91-196,113.09-78,448.75

Finding the Fourth Proportional to 142,110.91, 196,113.09 and 78,448.75

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Solution

The fourth proportional to 142,110.91, 196,113.09 and 78,448.75 is: 108,259.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,110.91 : 196,113.09 = 78,448.75 : x
  2. Step 2: Convert to fraction form
    142,110.91/196,113.09 = 78,448.75/x
  3. Step 3: Cross multiply
    142,110.91x = 196,113.09 × 78,448.75
  4. Step 4: Simplify right side
    142,110.91x = 15,384,826,769.14
  5. Step 5: Solve for x
    x = 15,384,826,769.14/142,110.91
  6. Step 6: Final answer
    x = 108,259.29

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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.