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Finding the Fourth Proportional to 140,061.60, 210,060.36 and 40,221

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Solution

The fourth proportional to 140,061.60, 210,060.36 and 40,221 is: 60,322.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,061.60 : 210,060.36 = 40,221 : x
  2. Step 2: Convert to fraction form
    140,061.60/210,060.36 = 40,221/x
  3. Step 3: Cross multiply
    140,061.60x = 210,060.36 × 40,221
  4. Step 4: Simplify right side
    140,061.60x = 8,448,837,739.56
  5. Step 5: Solve for x
    x = 8,448,837,739.56/140,061.60
  6. Step 6: Final answer
    x = 60,322.30

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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.