Home / 143,965.35-215,947.98-77,313.79

Finding the Fourth Proportional to 143,965.35, 215,947.98 and 77,313.79

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Solution

The fourth proportional to 143,965.35, 215,947.98 and 77,313.79 is: 115,970.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,965.35 : 215,947.98 = 77,313.79 : x
  2. Step 2: Convert to fraction form
    143,965.35/215,947.98 = 77,313.79/x
  3. Step 3: Cross multiply
    143,965.35x = 215,947.98 × 77,313.79
  4. Step 4: Simplify right side
    143,965.35x = 16,695,756,776.64
  5. Step 5: Solve for x
    x = 16,695,756,776.64/143,965.35
  6. Step 6: Final answer
    x = 115,970.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.