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Finding the Fourth Proportional to 68,785.61, 103,178.61 and 29,317.55

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Solution

The fourth proportional to 68,785.61, 103,178.61 and 29,317.55 is: 43,976.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,785.61 : 103,178.61 = 29,317.55 : x
  2. Step 2: Convert to fraction form
    68,785.61/103,178.61 = 29,317.55/x
  3. Step 3: Cross multiply
    68,785.61x = 103,178.61 × 29,317.55
  4. Step 4: Simplify right side
    68,785.61x = 3,024,943,541.71
  5. Step 5: Solve for x
    x = 3,024,943,541.71/68,785.61
  6. Step 6: Final answer
    x = 43,976.40

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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.