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Finding the Fourth Proportional to 108,638.14, 149,920.14 and 60,891.49

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Solution

The fourth proportional to 108,638.14, 149,920.14 and 60,891.49 is: 84,029.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,638.14 : 149,920.14 = 60,891.49 : x
  2. Step 2: Convert to fraction form
    108,638.14/149,920.14 = 60,891.49/x
  3. Step 3: Cross multiply
    108,638.14x = 149,920.14 × 60,891.49
  4. Step 4: Simplify right side
    108,638.14x = 9,128,860,705.61
  5. Step 5: Solve for x
    x = 9,128,860,705.61/108,638.14
  6. Step 6: Final answer
    x = 84,029.98

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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.