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Finding the Fourth Proportional to 139,767.06, 192,882 and 76,108.32

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Solution

The fourth proportional to 139,767.06, 192,882 and 76,108.32 is: 105,031.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,767.06 : 192,882 = 76,108.32 : x
  2. Step 2: Convert to fraction form
    139,767.06/192,882 = 76,108.32/x
  3. Step 3: Cross multiply
    139,767.06x = 192,882 × 76,108.32
  4. Step 4: Simplify right side
    139,767.06x = 14,679,924,978.24
  5. Step 5: Solve for x
    x = 14,679,924,978.24/139,767.06
  6. Step 6: Final answer
    x = 105,031.36

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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.