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Finding the Fourth Proportional to 140,819.60, 210,840.60 and 109,715.60

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Solution

The fourth proportional to 140,819.60, 210,840.60 and 109,715.60 is: 164,270.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,819.60 : 210,840.60 = 109,715.60 : x
  2. Step 2: Convert to fraction form
    140,819.60/210,840.60 = 109,715.60/x
  3. Step 3: Cross multiply
    140,819.60x = 210,840.60 × 109,715.60
  4. Step 4: Simplify right side
    140,819.60x = 23,132,502,933.36
  5. Step 5: Solve for x
    x = 23,132,502,933.36/140,819.60
  6. Step 6: Final answer
    x = 164,270.48

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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.