Home / 143,825.60-198,478.68-83,431.28

Finding the Fourth Proportional to 143,825.60, 198,478.68 and 83,431.28

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Solution

The fourth proportional to 143,825.60, 198,478.68 and 83,431.28 is: 115,134.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,825.60 : 198,478.68 = 83,431.28 : x
  2. Step 2: Convert to fraction form
    143,825.60/198,478.68 = 83,431.28/x
  3. Step 3: Cross multiply
    143,825.60x = 198,478.68 × 83,431.28
  4. Step 4: Simplify right side
    143,825.60x = 16,559,330,325.11
  5. Step 5: Solve for x
    x = 16,559,330,325.11/143,825.60
  6. Step 6: Final answer
    x = 115,134.79

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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.