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Finding the Fourth Proportional to 79,079.70, 118,558.80 and 39,665.10

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Solution

The fourth proportional to 79,079.70, 118,558.80 and 39,665.10 is: 59,467.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,079.70 : 118,558.80 = 39,665.10 : x
  2. Step 2: Convert to fraction form
    79,079.70/118,558.80 = 39,665.10/x
  3. Step 3: Cross multiply
    79,079.70x = 118,558.80 × 39,665.10
  4. Step 4: Simplify right side
    79,079.70x = 4,702,646,657.88
  5. Step 5: Solve for x
    x = 4,702,646,657.88/79,079.70
  6. Step 6: Final answer
    x = 59,467.18

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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.