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Finding the Fourth Proportional to 117,358.78, 161,954.23 and 63,643.90

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Solution

The fourth proportional to 117,358.78, 161,954.23 and 63,643.90 is: 87,828.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,358.78 : 161,954.23 = 63,643.90 : x
  2. Step 2: Convert to fraction form
    117,358.78/161,954.23 = 63,643.90/x
  3. Step 3: Cross multiply
    117,358.78x = 161,954.23 × 63,643.90
  4. Step 4: Simplify right side
    117,358.78x = 10,307,398,818.70
  5. Step 5: Solve for x
    x = 10,307,398,818.70/117,358.78
  6. Step 6: Final answer
    x = 87,828.10

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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.