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Finding the Fourth Proportional to 140,495.21, 210,687.34 and 56,239.67

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Solution

The fourth proportional to 140,495.21, 210,687.34 and 56,239.67 is: 84,337.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,495.21 : 210,687.34 = 56,239.67 : x
  2. Step 2: Convert to fraction form
    140,495.21/210,687.34 = 56,239.67/x
  3. Step 3: Cross multiply
    140,495.21x = 210,687.34 × 56,239.67
  4. Step 4: Simplify right side
    140,495.21x = 11,848,985,140.14
  5. Step 5: Solve for x
    x = 11,848,985,140.14/140,495.21
  6. Step 6: Final answer
    x = 84,337.29

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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.