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Finding the Fourth Proportional to 68,777.63, 103,159.53 and 18,862.74

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Solution

The fourth proportional to 68,777.63, 103,159.53 and 18,862.74 is: 28,292.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,777.63 : 103,159.53 = 18,862.74 : x
  2. Step 2: Convert to fraction form
    68,777.63/103,159.53 = 18,862.74/x
  3. Step 3: Cross multiply
    68,777.63x = 103,159.53 × 18,862.74
  4. Step 4: Simplify right side
    68,777.63x = 1,945,871,556.50
  5. Step 5: Solve for x
    x = 1,945,871,556.50/68,777.63
  6. Step 6: Final answer
    x = 28,292.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.