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Finding the Fourth Proportional to 139,112.61, 191,975.75 and 75,450.42

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Solution

The fourth proportional to 139,112.61, 191,975.75 and 75,450.42 is: 104,121.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,112.61 : 191,975.75 = 75,450.42 : x
  2. Step 2: Convert to fraction form
    139,112.61/191,975.75 = 75,450.42/x
  3. Step 3: Cross multiply
    139,112.61x = 191,975.75 × 75,450.42
  4. Step 4: Simplify right side
    139,112.61x = 14,484,650,967.32
  5. Step 5: Solve for x
    x = 14,484,650,967.32/139,112.61
  6. Step 6: Final answer
    x = 104,121.77

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1.5x scale

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.