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Finding the Fourth Proportional to 71,293.60, 106,940.40 and 18,708.40

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Solution

The fourth proportional to 71,293.60, 106,940.40 and 18,708.40 is: 28,062.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,293.60 : 106,940.40 = 18,708.40 : x
  2. Step 2: Convert to fraction form
    71,293.60/106,940.40 = 18,708.40/x
  3. Step 3: Cross multiply
    71,293.60x = 106,940.40 × 18,708.40
  4. Step 4: Simplify right side
    71,293.60x = 2,000,683,779.36
  5. Step 5: Solve for x
    x = 2,000,683,779.36/71,293.60
  6. Step 6: Final answer
    x = 28,062.60

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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.