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Finding the Fourth Proportional to 139,415.84, 192,393.48 and 75,753.86

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Solution

The fourth proportional to 139,415.84, 192,393.48 and 75,753.86 is: 104,540.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,415.84 : 192,393.48 = 75,753.86 : x
  2. Step 2: Convert to fraction form
    139,415.84/192,393.48 = 75,753.86/x
  3. Step 3: Cross multiply
    139,415.84x = 192,393.48 × 75,753.86
  4. Step 4: Simplify right side
    139,415.84x = 14,574,548,748.83
  5. Step 5: Solve for x
    x = 14,574,548,748.83/139,415.84
  6. Step 6: Final answer
    x = 104,540.12

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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.