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Finding the Fourth Proportional to 108,630.54, 149,916.49 and 81,724.97

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Solution

The fourth proportional to 108,630.54, 149,916.49 and 81,724.97 is: 112,785.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,630.54 : 149,916.49 = 81,724.97 : x
  2. Step 2: Convert to fraction form
    108,630.54/149,916.49 = 81,724.97/x
  3. Step 3: Cross multiply
    108,630.54x = 149,916.49 × 81,724.97
  4. Step 4: Simplify right side
    108,630.54x = 12,251,920,818.23
  5. Step 5: Solve for x
    x = 12,251,920,818.23/108,630.54
  6. Step 6: Final answer
    x = 112,785.23

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1.5x scale

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.