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Finding the Fourth Proportional to 90,339.91, 124,664.87 and 49,503.79

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Solution

The fourth proportional to 90,339.91, 124,664.87 and 49,503.79 is: 68,312.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,339.91 : 124,664.87 = 49,503.79 : x
  2. Step 2: Convert to fraction form
    90,339.91/124,664.87 = 49,503.79/x
  3. Step 3: Cross multiply
    90,339.91x = 124,664.87 × 49,503.79
  4. Step 4: Simplify right side
    90,339.91x = 6,171,383,824.45
  5. Step 5: Solve for x
    x = 6,171,383,824.45/90,339.91
  6. Step 6: Final answer
    x = 68,312.93

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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.