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Finding the Fourth Proportional to 108,371.70, 149,557.52 and 66,987.89

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Solution

The fourth proportional to 108,371.70, 149,557.52 and 66,987.89 is: 92,446.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,371.70 : 149,557.52 = 66,987.89 : x
  2. Step 2: Convert to fraction form
    108,371.70/149,557.52 = 66,987.89/x
  3. Step 3: Cross multiply
    108,371.70x = 149,557.52 × 66,987.89
  4. Step 4: Simplify right side
    108,371.70x = 10,018,542,678.96
  5. Step 5: Solve for x
    x = 10,018,542,678.96/108,371.70
  6. Step 6: Final answer
    x = 92,446.12

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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.