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Finding the Fourth Proportional to 68,730.30, 103,135.08 and 37,140.42

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Solution

The fourth proportional to 68,730.30, 103,135.08 and 37,140.42 is: 55,732.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,730.30 : 103,135.08 = 37,140.42 : x
  2. Step 2: Convert to fraction form
    68,730.30/103,135.08 = 37,140.42/x
  3. Step 3: Cross multiply
    68,730.30x = 103,135.08 × 37,140.42
  4. Step 4: Simplify right side
    68,730.30x = 3,830,480,187.93
  5. Step 5: Solve for x
    x = 3,830,480,187.93/68,730.30
  6. Step 6: Final answer
    x = 55,732.05

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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.