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Finding the Fourth Proportional to 108,717.76, 149,969.76 and 68,416.48

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Solution

The fourth proportional to 108,717.76, 149,969.76 and 68,416.48 is: 94,376.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,717.76 : 149,969.76 = 68,416.48 : x
  2. Step 2: Convert to fraction form
    108,717.76/149,969.76 = 68,416.48/x
  3. Step 3: Cross multiply
    108,717.76x = 149,969.76 × 68,416.48
  4. Step 4: Simplify right side
    108,717.76x = 10,260,403,085.64
  5. Step 5: Solve for x
    x = 10,260,403,085.64/108,717.76
  6. Step 6: Final answer
    x = 94,376.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.