Home / 143,105.90-197,476.23-79,438.70

Finding the Fourth Proportional to 143,105.90, 197,476.23 and 79,438.70

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Solution

The fourth proportional to 143,105.90, 197,476.23 and 79,438.70 is: 109,619.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,105.90 : 197,476.23 = 79,438.70 : x
  2. Step 2: Convert to fraction form
    143,105.90/197,476.23 = 79,438.70/x
  3. Step 3: Cross multiply
    143,105.90x = 197,476.23 × 79,438.70
  4. Step 4: Simplify right side
    143,105.90x = 15,687,254,992.10
  5. Step 5: Solve for x
    x = 15,687,254,992.10/143,105.90
  6. Step 6: Final answer
    x = 109,619.90

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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.