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Finding the Fourth Proportional to 68,980.88, 103,377.75 and 31,494.48

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Solution

The fourth proportional to 68,980.88, 103,377.75 and 31,494.48 is: 47,199.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,980.88 : 103,377.75 = 31,494.48 : x
  2. Step 2: Convert to fraction form
    68,980.88/103,377.75 = 31,494.48/x
  3. Step 3: Cross multiply
    68,980.88x = 103,377.75 × 31,494.48
  4. Step 4: Simplify right side
    68,980.88x = 3,255,828,479.82
  5. Step 5: Solve for x
    x = 3,255,828,479.82/68,980.88
  6. Step 6: Final answer
    x = 47,199.00

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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.