Home / 81,424.45-122,106.70-28,102.86

Finding the Fourth Proportional to 81,424.45, 122,106.70 and 28,102.86

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Solution

The fourth proportional to 81,424.45, 122,106.70 and 28,102.86 is: 42,143.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424.45 : 122,106.70 = 28,102.86 : x
  2. Step 2: Convert to fraction form
    81,424.45/122,106.70 = 28,102.86/x
  3. Step 3: Cross multiply
    81,424.45x = 122,106.70 × 28,102.86
  4. Step 4: Simplify right side
    81,424.45x = 3,431,547,530.29
  5. Step 5: Solve for x
    x = 3,431,547,530.29/81,424.45
  6. Step 6: Final answer
    x = 42,143.94

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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.