Home / 143,106.85-197,488.34-78,578.88

Finding the Fourth Proportional to 143,106.85, 197,488.34 and 78,578.88

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Solution

The fourth proportional to 143,106.85, 197,488.34 and 78,578.88 is: 108,439.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,106.85 : 197,488.34 = 78,578.88 : x
  2. Step 2: Convert to fraction form
    143,106.85/197,488.34 = 78,578.88/x
  3. Step 3: Cross multiply
    143,106.85x = 197,488.34 × 78,578.88
  4. Step 4: Simplify right side
    143,106.85x = 15,518,412,570.26
  5. Step 5: Solve for x
    x = 15,518,412,570.26/143,106.85
  6. Step 6: Final answer
    x = 108,439.34

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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.