Home / 103,921.08-143,373.42-85,137.72

Finding the Fourth Proportional to 103,921.08, 143,373.42 and 85,137.72

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Solution

The fourth proportional to 103,921.08, 143,373.42 and 85,137.72 is: 117,459.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,921.08 : 143,373.42 = 85,137.72 : x
  2. Step 2: Convert to fraction form
    103,921.08/143,373.42 = 85,137.72/x
  3. Step 3: Cross multiply
    103,921.08x = 143,373.42 × 85,137.72
  4. Step 4: Simplify right side
    103,921.08x = 12,206,486,087.40
  5. Step 5: Solve for x
    x = 12,206,486,087.40/103,921.08
  6. Step 6: Final answer
    x = 117,459.19

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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.