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Finding the Fourth Proportional to 128,722.86, 193,110.30 and 44,486.10

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Solution

The fourth proportional to 128,722.86, 193,110.30 and 44,486.10 is: 66,738.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.86 : 193,110.30 = 44,486.10 : x
  2. Step 2: Convert to fraction form
    128,722.86/193,110.30 = 44,486.10/x
  3. Step 3: Cross multiply
    128,722.86x = 193,110.30 × 44,486.10
  4. Step 4: Simplify right side
    128,722.86x = 8,590,724,116.83
  5. Step 5: Solve for x
    x = 8,590,724,116.83/128,722.86
  6. Step 6: Final answer
    x = 66,738.14

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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.