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Finding the Fourth Proportional to 51,081.84, 70,491.84 and 28,420.38

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Solution

The fourth proportional to 51,081.84, 70,491.84 and 28,420.38 is: 39,219.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,081.84 : 70,491.84 = 28,420.38 : x
  2. Step 2: Convert to fraction form
    51,081.84/70,491.84 = 28,420.38/x
  3. Step 3: Cross multiply
    51,081.84x = 70,491.84 × 28,420.38
  4. Step 4: Simplify right side
    51,081.84x = 2,003,404,879.70
  5. Step 5: Solve for x
    x = 2,003,404,879.70/51,081.84
  6. Step 6: Final answer
    x = 39,219.51

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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.