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Finding the Fourth Proportional to 68,443.60, 102,519.60 and 56,779.60

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Solution

The fourth proportional to 68,443.60, 102,519.60 and 56,779.60 is: 85,048.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,443.60 : 102,519.60 = 56,779.60 : x
  2. Step 2: Convert to fraction form
    68,443.60/102,519.60 = 56,779.60/x
  3. Step 3: Cross multiply
    68,443.60x = 102,519.60 × 56,779.60
  4. Step 4: Simplify right side
    68,443.60x = 5,821,021,880.16
  5. Step 5: Solve for x
    x = 5,821,021,880.16/68,443.60
  6. Step 6: Final answer
    x = 85,048.45

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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.