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Finding the Fourth Proportional to 140,603.21, 210,926.80 and 45,811.38

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Solution

The fourth proportional to 140,603.21, 210,926.80 and 45,811.38 is: 68,724.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,603.21 : 210,926.80 = 45,811.38 : x
  2. Step 2: Convert to fraction form
    140,603.21/210,926.80 = 45,811.38/x
  3. Step 3: Cross multiply
    140,603.21x = 210,926.80 × 45,811.38
  4. Step 4: Simplify right side
    140,603.21x = 9,662,848,635.22
  5. Step 5: Solve for x
    x = 9,662,848,635.22/140,603.21
  6. Step 6: Final answer
    x = 68,724.24

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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.