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Finding the Fourth Proportional to 74,856.94, 103,319.95 and 49,367.91

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Solution

The fourth proportional to 74,856.94, 103,319.95 and 49,367.91 is: 68,139.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,856.94 : 103,319.95 = 49,367.91 : x
  2. Step 2: Convert to fraction form
    74,856.94/103,319.95 = 49,367.91/x
  3. Step 3: Cross multiply
    74,856.94x = 103,319.95 × 49,367.91
  4. Step 4: Simplify right side
    74,856.94x = 5,100,689,992.80
  5. Step 5: Solve for x
    x = 5,100,689,992.80/74,856.94
  6. Step 6: Final answer
    x = 68,139.17

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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.