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Finding the Fourth Proportional to 68,054.40, 102,081.60 and 21,307.32

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Solution

The fourth proportional to 68,054.40, 102,081.60 and 21,307.32 is: 31,960.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,054.40 : 102,081.60 = 21,307.32 : x
  2. Step 2: Convert to fraction form
    68,054.40/102,081.60 = 21,307.32/x
  3. Step 3: Cross multiply
    68,054.40x = 102,081.60 × 21,307.32
  4. Step 4: Simplify right side
    68,054.40x = 2,175,085,317.31
  5. Step 5: Solve for x
    x = 2,175,085,317.31/68,054.40
  6. Step 6: Final answer
    x = 31,960.98

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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.