Home / 143,103.40-197,487.78-79,442.20

Finding the Fourth Proportional to 143,103.40, 197,487.78 and 79,442.20

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Solution

The fourth proportional to 143,103.40, 197,487.78 and 79,442.20 is: 109,633.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,103.40 : 197,487.78 = 79,442.20 : x
  2. Step 2: Convert to fraction form
    143,103.40/197,487.78 = 79,442.20/x
  3. Step 3: Cross multiply
    143,103.40x = 197,487.78 × 79,442.20
  4. Step 4: Simplify right side
    143,103.40x = 15,688,863,716.32
  5. Step 5: Solve for x
    x = 15,688,863,716.32/143,103.40
  6. Step 6: Final answer
    x = 109,633.06

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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.