Home / 80,905.20-121,357.80-52,911.60

Finding the Fourth Proportional to 80,905.20, 121,357.80 and 52,911.60

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Solution

The fourth proportional to 80,905.20, 121,357.80 and 52,911.60 is: 79,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,905.20 : 121,357.80 = 52,911.60 : x
  2. Step 2: Convert to fraction form
    80,905.20/121,357.80 = 52,911.60/x
  3. Step 3: Cross multiply
    80,905.20x = 121,357.80 × 52,911.60
  4. Step 4: Simplify right side
    80,905.20x = 6,421,235,370.48
  5. Step 5: Solve for x
    x = 6,421,235,370.48/80,905.20
  6. Step 6: Final answer
    x = 79,367.40

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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.