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Finding the Fourth Proportional to 66,913.48, 100,374.06 and 20,161.48

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Solution

The fourth proportional to 66,913.48, 100,374.06 and 20,161.48 is: 30,243.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,913.48 : 100,374.06 = 20,161.48 : x
  2. Step 2: Convert to fraction form
    66,913.48/100,374.06 = 20,161.48/x
  3. Step 3: Cross multiply
    66,913.48x = 100,374.06 × 20,161.48
  4. Step 4: Simplify right side
    66,913.48x = 2,023,689,603.21
  5. Step 5: Solve for x
    x = 2,023,689,603.21/66,913.48
  6. Step 6: Final answer
    x = 30,243.38

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1.5x scale

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.