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Finding the Fourth Proportional to 40,076.64, 60,130.80 and 12,376.80

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Solution

The fourth proportional to 40,076.64, 60,130.80 and 12,376.80 is: 18,570.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,076.64 : 60,130.80 = 12,376.80 : x
  2. Step 2: Convert to fraction form
    40,076.64/60,130.80 = 12,376.80/x
  3. Step 3: Cross multiply
    40,076.64x = 60,130.80 × 12,376.80
  4. Step 4: Simplify right side
    40,076.64x = 744,226,885.44
  5. Step 5: Solve for x
    x = 744,226,885.44/40,076.64
  6. Step 6: Final answer
    x = 18,570.09

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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.