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Finding the Fourth Proportional to 117,989.20, 162,813 and 70,244.56

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Solution

The fourth proportional to 117,989.20, 162,813 and 70,244.56 is: 96,930.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,989.20 : 162,813 = 70,244.56 : x
  2. Step 2: Convert to fraction form
    117,989.20/162,813 = 70,244.56/x
  3. Step 3: Cross multiply
    117,989.20x = 162,813 × 70,244.56
  4. Step 4: Simplify right side
    117,989.20x = 11,436,727,547.28
  5. Step 5: Solve for x
    x = 11,436,727,547.28/117,989.20
  6. Step 6: Final answer
    x = 96,930.29

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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.