Home / 143,409.63-197,910.09-78,881.60

Finding the Fourth Proportional to 143,409.63, 197,910.09 and 78,881.60

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Solution

The fourth proportional to 143,409.63, 197,910.09 and 78,881.60 is: 108,859.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,409.63 : 197,910.09 = 78,881.60 : x
  2. Step 2: Convert to fraction form
    143,409.63/197,910.09 = 78,881.60/x
  3. Step 3: Cross multiply
    143,409.63x = 197,910.09 × 78,881.60
  4. Step 4: Simplify right side
    143,409.63x = 15,611,463,565.79
  5. Step 5: Solve for x
    x = 15,611,463,565.79/143,409.63
  6. Step 6: Final answer
    x = 108,859.24

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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.