Home / 103,238.15-154,157.99-81,939.20

Finding the Fourth Proportional to 103,238.15, 154,157.99 and 81,939.20

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Solution

The fourth proportional to 103,238.15, 154,157.99 and 81,939.20 is: 122,353.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,238.15 : 154,157.99 = 81,939.20 : x
  2. Step 2: Convert to fraction form
    103,238.15/154,157.99 = 81,939.20/x
  3. Step 3: Cross multiply
    103,238.15x = 154,157.99 × 81,939.20
  4. Step 4: Simplify right side
    103,238.15x = 12,631,581,193.72
  5. Step 5: Solve for x
    x = 12,631,581,193.72/103,238.15
  6. Step 6: Final answer
    x = 122,353.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.