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Finding the Fourth Proportional to 90,149.86, 124,508.91 and 61,419.67

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Solution

The fourth proportional to 90,149.86, 124,508.91 and 61,419.67 is: 84,828.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,149.86 : 124,508.91 = 61,419.67 : x
  2. Step 2: Convert to fraction form
    90,149.86/124,508.91 = 61,419.67/x
  3. Step 3: Cross multiply
    90,149.86x = 124,508.91 × 61,419.67
  4. Step 4: Simplify right side
    90,149.86x = 7,647,296,083.31
  5. Step 5: Solve for x
    x = 7,647,296,083.31/90,149.86
  6. Step 6: Final answer
    x = 84,828.71

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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.