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Finding the Fourth Proportional to 117,851.90, 161,575.16 and 115,719.57

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Solution

The fourth proportional to 117,851.90, 161,575.16 and 115,719.57 is: 158,651.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,851.90 : 161,575.16 = 115,719.57 : x
  2. Step 2: Convert to fraction form
    117,851.90/161,575.16 = 115,719.57/x
  3. Step 3: Cross multiply
    117,851.90x = 161,575.16 × 115,719.57
  4. Step 4: Simplify right side
    117,851.90x = 18,697,407,459.28
  5. Step 5: Solve for x
    x = 18,697,407,459.28/117,851.90
  6. Step 6: Final answer
    x = 158,651.73

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.