Home / 143,633.05-198,221.78-86,289.91

Finding the Fourth Proportional to 143,633.05, 198,221.78 and 86,289.91

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Solution

The fourth proportional to 143,633.05, 198,221.78 and 86,289.91 is: 119,084.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,633.05 : 198,221.78 = 86,289.91 : x
  2. Step 2: Convert to fraction form
    143,633.05/198,221.78 = 86,289.91/x
  3. Step 3: Cross multiply
    143,633.05x = 198,221.78 × 86,289.91
  4. Step 4: Simplify right side
    143,633.05x = 17,104,539,276.41
  5. Step 5: Solve for x
    x = 17,104,539,276.41/143,633.05
  6. Step 6: Final answer
    x = 119,084.98

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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.