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Finding the Fourth Proportional to 117,343.56, 161,891.68 and 77,079

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Solution

The fourth proportional to 117,343.56, 161,891.68 and 77,079 is: 106,341.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,343.56 : 161,891.68 = 77,079 : x
  2. Step 2: Convert to fraction form
    117,343.56/161,891.68 = 77,079/x
  3. Step 3: Cross multiply
    117,343.56x = 161,891.68 × 77,079
  4. Step 4: Simplify right side
    117,343.56x = 12,478,448,802.72
  5. Step 5: Solve for x
    x = 12,478,448,802.72/117,343.56
  6. Step 6: Final answer
    x = 106,341.15

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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.