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Finding the Fourth Proportional to 140,622.92, 210,868.75 and 81,475.50

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Solution

The fourth proportional to 140,622.92, 210,868.75 and 81,475.50 is: 122,175.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,622.92 : 210,868.75 = 81,475.50 : x
  2. Step 2: Convert to fraction form
    140,622.92/210,868.75 = 81,475.50/x
  3. Step 3: Cross multiply
    140,622.92x = 210,868.75 × 81,475.50
  4. Step 4: Simplify right side
    140,622.92x = 17,180,636,840.63
  5. Step 5: Solve for x
    x = 17,180,636,840.63/140,622.92
  6. Step 6: Final answer
    x = 122,175.22

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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.