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Finding the Fourth Proportional to 140,661.25, 210,991.92 and 42,165.25

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Solution

The fourth proportional to 140,661.25, 210,991.92 and 42,165.25 is: 63,247.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,661.25 : 210,991.92 = 42,165.25 : x
  2. Step 2: Convert to fraction form
    140,661.25/210,991.92 = 42,165.25/x
  3. Step 3: Cross multiply
    140,661.25x = 210,991.92 × 42,165.25
  4. Step 4: Simplify right side
    140,661.25x = 8,896,527,054.78
  5. Step 5: Solve for x
    x = 8,896,527,054.78/140,661.25
  6. Step 6: Final answer
    x = 63,247.89

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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.