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Finding the Fourth Proportional to 70,710.84, 106,066.22 and 20,791.35

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Solution

The fourth proportional to 70,710.84, 106,066.22 and 20,791.35 is: 31,187.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,710.84 : 106,066.22 = 20,791.35 : x
  2. Step 2: Convert to fraction form
    70,710.84/106,066.22 = 20,791.35/x
  3. Step 3: Cross multiply
    70,710.84x = 106,066.22 × 20,791.35
  4. Step 4: Simplify right side
    70,710.84x = 2,205,259,903.20
  5. Step 5: Solve for x
    x = 2,205,259,903.20/70,710.84
  6. Step 6: Final answer
    x = 31,187.01

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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.