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Finding the Fourth Proportional to 68,416.95, 102,615.16 and 21,663.75

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Solution

The fourth proportional to 68,416.95, 102,615.16 and 21,663.75 is: 32,492.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,416.95 : 102,615.16 = 21,663.75 : x
  2. Step 2: Convert to fraction form
    68,416.95/102,615.16 = 21,663.75/x
  3. Step 3: Cross multiply
    68,416.95x = 102,615.16 × 21,663.75
  4. Step 4: Simplify right side
    68,416.95x = 2,223,029,172.45
  5. Step 5: Solve for x
    x = 2,223,029,172.45/68,416.95
  6. Step 6: Final answer
    x = 32,492.37

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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.