Home / 143,709.40-215,564.10-129,712.60

Finding the Fourth Proportional to 143,709.40, 215,564.10 and 129,712.60

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Solution

The fourth proportional to 143,709.40, 215,564.10 and 129,712.60 is: 194,568.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,709.40 : 215,564.10 = 129,712.60 : x
  2. Step 2: Convert to fraction form
    143,709.40/215,564.10 = 129,712.60/x
  3. Step 3: Cross multiply
    143,709.40x = 215,564.10 × 129,712.60
  4. Step 4: Simplify right side
    143,709.40x = 27,961,379,877.66
  5. Step 5: Solve for x
    x = 27,961,379,877.66/143,709.40
  6. Step 6: Final answer
    x = 194,568.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.