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Finding the Fourth Proportional to 117,130.40, 161,556.58 and 80,845.80

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Solution

The fourth proportional to 117,130.40, 161,556.58 and 80,845.80 is: 111,509.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,130.40 : 161,556.58 = 80,845.80 : x
  2. Step 2: Convert to fraction form
    117,130.40/161,556.58 = 80,845.80/x
  3. Step 3: Cross multiply
    117,130.40x = 161,556.58 × 80,845.80
  4. Step 4: Simplify right side
    117,130.40x = 13,061,169,995.83
  5. Step 5: Solve for x
    x = 13,061,169,995.83/117,130.40
  6. Step 6: Final answer
    x = 111,509.65

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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.