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Finding the Fourth Proportional to 70,887.68, 106,352.28 and 20,969.10

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Solution

The fourth proportional to 70,887.68, 106,352.28 and 20,969.10 is: 31,459.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,887.68 : 106,352.28 = 20,969.10 : x
  2. Step 2: Convert to fraction form
    70,887.68/106,352.28 = 20,969.10/x
  3. Step 3: Cross multiply
    70,887.68x = 106,352.28 × 20,969.10
  4. Step 4: Simplify right side
    70,887.68x = 2,230,111,594.55
  5. Step 5: Solve for x
    x = 2,230,111,594.55/70,887.68
  6. Step 6: Final answer
    x = 31,459.79

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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.