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Finding the Fourth Proportional to 53,911.40, 80,877.90 and 45,206.60

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Solution

The fourth proportional to 53,911.40, 80,877.90 and 45,206.60 is: 67,818.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,911.40 : 80,877.90 = 45,206.60 : x
  2. Step 2: Convert to fraction form
    53,911.40/80,877.90 = 45,206.60/x
  3. Step 3: Cross multiply
    53,911.40x = 80,877.90 × 45,206.60
  4. Step 4: Simplify right side
    53,911.40x = 3,656,214,874.14
  5. Step 5: Solve for x
    x = 3,656,214,874.14/53,911.40
  6. Step 6: Final answer
    x = 67,818.96

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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.