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Finding the Fourth Proportional to 85,669.80, 127,891.55 and 74,462.81

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Solution

The fourth proportional to 85,669.80, 127,891.55 and 74,462.81 is: 111,161.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,669.80 : 127,891.55 = 74,462.81 : x
  2. Step 2: Convert to fraction form
    85,669.80/127,891.55 = 74,462.81/x
  3. Step 3: Cross multiply
    85,669.80x = 127,891.55 × 74,462.81
  4. Step 4: Simplify right side
    85,669.80x = 9,523,163,176.48
  5. Step 5: Solve for x
    x = 9,523,163,176.48/85,669.80
  6. Step 6: Final answer
    x = 111,161.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.