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Finding the Fourth Proportional to 139,944.81, 210,005.61 and 73,432.67

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Solution

The fourth proportional to 139,944.81, 210,005.61 and 73,432.67 is: 110,195.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,944.81 : 210,005.61 = 73,432.67 : x
  2. Step 2: Convert to fraction form
    139,944.81/210,005.61 = 73,432.67/x
  3. Step 3: Cross multiply
    139,944.81x = 210,005.61 × 73,432.67
  4. Step 4: Simplify right side
    139,944.81x = 15,421,272,290.12
  5. Step 5: Solve for x
    x = 15,421,272,290.12/139,944.81
  6. Step 6: Final answer
    x = 110,195.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.