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Finding the Fourth Proportional to 140,414.63, 210,621.94 and 128,235.77

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Solution

The fourth proportional to 140,414.63, 210,621.94 and 128,235.77 is: 192,353.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,414.63 : 210,621.94 = 128,235.77 : x
  2. Step 2: Convert to fraction form
    140,414.63/210,621.94 = 128,235.77/x
  3. Step 3: Cross multiply
    140,414.63x = 210,621.94 × 128,235.77
  4. Step 4: Simplify right side
    140,414.63x = 27,009,266,637.61
  5. Step 5: Solve for x
    x = 27,009,266,637.61/140,414.63
  6. Step 6: Final answer
    x = 192,353.66

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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.