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Finding the Fourth Proportional to 78,343.77, 108,161.52 and 73,860.42

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Solution

The fourth proportional to 78,343.77, 108,161.52 and 73,860.42 is: 101,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,343.77 : 108,161.52 = 73,860.42 : x
  2. Step 2: Convert to fraction form
    78,343.77/108,161.52 = 73,860.42/x
  3. Step 3: Cross multiply
    78,343.77x = 108,161.52 × 73,860.42
  4. Step 4: Simplify right side
    78,343.77x = 7,988,855,295.04
  5. Step 5: Solve for x
    x = 7,988,855,295.04/78,343.77
  6. Step 6: Final answer
    x = 101,971.80

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1.5x scale

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.