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Finding the Fourth Proportional to 116,937.63, 161,447.72 and 81,115.11

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Solution

The fourth proportional to 116,937.63, 161,447.72 and 81,115.11 is: 111,990.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,937.63 : 161,447.72 = 81,115.11 : x
  2. Step 2: Convert to fraction form
    116,937.63/161,447.72 = 81,115.11/x
  3. Step 3: Cross multiply
    116,937.63x = 161,447.72 × 81,115.11
  4. Step 4: Simplify right side
    116,937.63x = 13,095,849,161.47
  5. Step 5: Solve for x
    x = 13,095,849,161.47/116,937.63
  6. Step 6: Final answer
    x = 111,990.03

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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.