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Finding the Fourth Proportional to 139,321.08, 192,257.96 and 75,657.51

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Solution

The fourth proportional to 139,321.08, 192,257.96 and 75,657.51 is: 104,404.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,321.08 : 192,257.96 = 75,657.51 : x
  2. Step 2: Convert to fraction form
    139,321.08/192,257.96 = 75,657.51/x
  3. Step 3: Cross multiply
    139,321.08x = 192,257.96 × 75,657.51
  4. Step 4: Simplify right side
    139,321.08x = 14,545,758,152.99
  5. Step 5: Solve for x
    x = 14,545,758,152.99/139,321.08
  6. Step 6: Final answer
    x = 104,404.58

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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.