Home / 143,219.10-197,642.91-78,693.56

Finding the Fourth Proportional to 143,219.10, 197,642.91 and 78,693.56

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Solution

The fourth proportional to 143,219.10, 197,642.91 and 78,693.56 is: 108,597.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,219.10 : 197,642.91 = 78,693.56 : x
  2. Step 2: Convert to fraction form
    143,219.10/197,642.91 = 78,693.56/x
  3. Step 3: Cross multiply
    143,219.10x = 197,642.91 × 78,693.56
  4. Step 4: Simplify right side
    143,219.10x = 15,553,224,985.87
  5. Step 5: Solve for x
    x = 15,553,224,985.87/143,219.10
  6. Step 6: Final answer
    x = 108,597.42

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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.