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Finding the Fourth Proportional to 79,880.28, 119,823.48 and 20,714.40

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Solution

The fourth proportional to 79,880.28, 119,823.48 and 20,714.40 is: 31,072.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,880.28 : 119,823.48 = 20,714.40 : x
  2. Step 2: Convert to fraction form
    79,880.28/119,823.48 = 20,714.40/x
  3. Step 3: Cross multiply
    79,880.28x = 119,823.48 × 20,714.40
  4. Step 4: Simplify right side
    79,880.28x = 2,482,071,494.11
  5. Step 5: Solve for x
    x = 2,482,071,494.11/79,880.28
  6. Step 6: Final answer
    x = 31,072.39

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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.