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Finding the Fourth Proportional to 70,802.29, 106,221.66 and 20,880.37

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Solution

The fourth proportional to 70,802.29, 106,221.66 and 20,880.37 is: 31,325.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,802.29 : 106,221.66 = 20,880.37 : x
  2. Step 2: Convert to fraction form
    70,802.29/106,221.66 = 20,880.37/x
  3. Step 3: Cross multiply
    70,802.29x = 106,221.66 × 20,880.37
  4. Step 4: Simplify right side
    70,802.29x = 2,217,947,562.81
  5. Step 5: Solve for x
    x = 2,217,947,562.81/70,802.29
  6. Step 6: Final answer
    x = 31,325.93

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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.