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Finding the Fourth Proportional to 139,628.56, 209,486.76 and 46,199.92

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Solution

The fourth proportional to 139,628.56, 209,486.76 and 46,199.92 is: 69,314.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,628.56 : 209,486.76 = 46,199.92 : x
  2. Step 2: Convert to fraction form
    139,628.56/209,486.76 = 46,199.92/x
  3. Step 3: Cross multiply
    139,628.56x = 209,486.76 × 46,199.92
  4. Step 4: Simplify right side
    139,628.56x = 9,678,271,553.06
  5. Step 5: Solve for x
    x = 9,678,271,553.06/139,628.56
  6. Step 6: Final answer
    x = 69,314.41

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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.