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Finding the Fourth Proportional to 139,379.64, 192,345.54 and 75,718.44

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Solution

The fourth proportional to 139,379.64, 192,345.54 and 75,718.44 is: 104,492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,379.64 : 192,345.54 = 75,718.44 : x
  2. Step 2: Convert to fraction form
    139,379.64/192,345.54 = 75,718.44/x
  3. Step 3: Cross multiply
    139,379.64x = 192,345.54 × 75,718.44
  4. Step 4: Simplify right side
    139,379.64x = 14,564,104,229.76
  5. Step 5: Solve for x
    x = 14,564,104,229.76/139,379.64
  6. Step 6: Final answer
    x = 104,492.34

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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.