Home / 143,105.85-197,486.96-78,577.88

Finding the Fourth Proportional to 143,105.85, 197,486.96 and 78,577.88

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Solution

The fourth proportional to 143,105.85, 197,486.96 and 78,577.88 is: 108,437.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,105.85 : 197,486.96 = 78,577.88 : x
  2. Step 2: Convert to fraction form
    143,105.85/197,486.96 = 78,577.88/x
  3. Step 3: Cross multiply
    143,105.85x = 197,486.96 × 78,577.88
  4. Step 4: Simplify right side
    143,105.85x = 15,518,105,264.12
  5. Step 5: Solve for x
    x = 15,518,105,264.12/143,105.85
  6. Step 6: Final answer
    x = 108,437.95

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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.