Home / 103,638.10-155,238.45-92,557.30

Finding the Fourth Proportional to 103,638.10, 155,238.45 and 92,557.30

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Solution

The fourth proportional to 103,638.10, 155,238.45 and 92,557.30 is: 138,640.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.10 : 155,238.45 = 92,557.30 : x
  2. Step 2: Convert to fraction form
    103,638.10/155,238.45 = 92,557.30/x
  3. Step 3: Cross multiply
    103,638.10x = 155,238.45 × 92,557.30
  4. Step 4: Simplify right side
    103,638.10x = 14,368,451,788.19
  5. Step 5: Solve for x
    x = 14,368,451,788.19/103,638.10
  6. Step 6: Final answer
    x = 138,640.63

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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.