Home / 103,720.97-143,137.82-63,434.00

Finding the Fourth Proportional to 103,720.97, 143,137.82 and 63,434.00

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Solution

The fourth proportional to 103,720.97, 143,137.82 and 63,434.00 is: 87,540.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,720.97 : 143,137.82 = 63,434.00 : x
  2. Step 2: Convert to fraction form
    103,720.97/143,137.82 = 63,434.00/x
  3. Step 3: Cross multiply
    103,720.97x = 143,137.82 × 63,434.00
  4. Step 4: Simplify right side
    103,720.97x = 9,079,803,441.02
  5. Step 5: Solve for x
    x = 9,079,803,441.02/103,720.97
  6. Step 6: Final answer
    x = 87,540.68

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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.