Home / 143,012.40-197,380.80-79,370.64

Finding the Fourth Proportional to 143,012.40, 197,380.80 and 79,370.64

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Solution

The fourth proportional to 143,012.40, 197,380.80 and 79,370.64 is: 109,544.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,012.40 : 197,380.80 = 79,370.64 : x
  2. Step 2: Convert to fraction form
    143,012.40/197,380.80 = 79,370.64/x
  3. Step 3: Cross multiply
    143,012.40x = 197,380.80 × 79,370.64
  4. Step 4: Simplify right side
    143,012.40x = 15,666,240,419.71
  5. Step 5: Solve for x
    x = 15,666,240,419.71/143,012.40
  6. Step 6: Final answer
    x = 109,544.63

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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.