Home / 143,387.08-197,876.45-78,859.14

Finding the Fourth Proportional to 143,387.08, 197,876.45 and 78,859.14

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Solution

The fourth proportional to 143,387.08, 197,876.45 and 78,859.14 is: 108,826.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,387.08 : 197,876.45 = 78,859.14 : x
  2. Step 2: Convert to fraction form
    143,387.08/197,876.45 = 78,859.14/x
  3. Step 3: Cross multiply
    143,387.08x = 197,876.45 × 78,859.14
  4. Step 4: Simplify right side
    143,387.08x = 15,604,366,128.36
  5. Step 5: Solve for x
    x = 15,604,366,128.36/143,387.08
  6. Step 6: Final answer
    x = 108,826.87

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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.