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Finding the Fourth Proportional to 40,314.40, 60,421.20 and 20,600.80

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Solution

The fourth proportional to 40,314.40, 60,421.20 and 20,600.80 is: 30,875.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,314.40 : 60,421.20 = 20,600.80 : x
  2. Step 2: Convert to fraction form
    40,314.40/60,421.20 = 20,600.80/x
  3. Step 3: Cross multiply
    40,314.40x = 60,421.20 × 20,600.80
  4. Step 4: Simplify right side
    40,314.40x = 1,244,725,056.96
  5. Step 5: Solve for x
    x = 1,244,725,056.96/40,314.40
  6. Step 6: Final answer
    x = 30,875.45

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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.