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Finding the Fourth Proportional to 139,763.31, 192,873.15 and 76,101.05

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Solution

The fourth proportional to 139,763.31, 192,873.15 and 76,101.05 is: 105,019.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,763.31 : 192,873.15 = 76,101.05 : x
  2. Step 2: Convert to fraction form
    139,763.31/192,873.15 = 76,101.05/x
  3. Step 3: Cross multiply
    139,763.31x = 192,873.15 × 76,101.05
  4. Step 4: Simplify right side
    139,763.31x = 14,677,849,713.99
  5. Step 5: Solve for x
    x = 14,677,849,713.99/139,763.31
  6. Step 6: Final answer
    x = 105,019.34

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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.