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Finding the Fourth Proportional to 71,094.40, 106,590.40 and 39,939.20

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Solution

The fourth proportional to 71,094.40, 106,590.40 and 39,939.20 is: 59,880.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,094.40 : 106,590.40 = 39,939.20 : x
  2. Step 2: Convert to fraction form
    71,094.40/106,590.40 = 39,939.20/x
  3. Step 3: Cross multiply
    71,094.40x = 106,590.40 × 39,939.20
  4. Step 4: Simplify right side
    71,094.40x = 4,257,135,303.68
  5. Step 5: Solve for x
    x = 4,257,135,303.68/71,094.40
  6. Step 6: Final answer
    x = 59,880.04

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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.