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Finding the Fourth Proportional to 139,737.35, 192,840.99 and 76,078.64

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Solution

The fourth proportional to 139,737.35, 192,840.99 and 76,078.64 is: 104,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,737.35 : 192,840.99 = 76,078.64 : x
  2. Step 2: Convert to fraction form
    139,737.35/192,840.99 = 76,078.64/x
  3. Step 3: Cross multiply
    139,737.35x = 192,840.99 × 76,078.64
  4. Step 4: Simplify right side
    139,737.35x = 14,671,080,255.45
  5. Step 5: Solve for x
    x = 14,671,080,255.45/139,737.35
  6. Step 6: Final answer
    x = 104,990.40

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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.