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Finding the Fourth Proportional to 80,762.40, 121,143.60 and 49,269.60

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Solution

The fourth proportional to 80,762.40, 121,143.60 and 49,269.60 is: 73,904.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,762.40 : 121,143.60 = 49,269.60 : x
  2. Step 2: Convert to fraction form
    80,762.40/121,143.60 = 49,269.60/x
  3. Step 3: Cross multiply
    80,762.40x = 121,143.60 × 49,269.60
  4. Step 4: Simplify right side
    80,762.40x = 5,968,696,714.56
  5. Step 5: Solve for x
    x = 5,968,696,714.56/80,762.40
  6. Step 6: Final answer
    x = 73,904.40

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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.