Home / 143,355.70-197,835.96-78,829.86

Finding the Fourth Proportional to 143,355.70, 197,835.96 and 78,829.86

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Solution

The fourth proportional to 143,355.70, 197,835.96 and 78,829.86 is: 108,788.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,355.70 : 197,835.96 = 78,829.86 : x
  2. Step 2: Convert to fraction form
    143,355.70/197,835.96 = 78,829.86/x
  3. Step 3: Cross multiply
    143,355.70x = 197,835.96 × 78,829.86
  4. Step 4: Simplify right side
    143,355.70x = 15,595,381,029.77
  5. Step 5: Solve for x
    x = 15,595,381,029.77/143,355.70
  6. Step 6: Final answer
    x = 108,788.01

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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.