Home / 80,905.76-121,173.60-71,445.36

Finding the Fourth Proportional to 80,905.76, 121,173.60 and 71,445.36

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Solution

The fourth proportional to 80,905.76, 121,173.60 and 71,445.36 is: 107,004.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,905.76 : 121,173.60 = 71,445.36 : x
  2. Step 2: Convert to fraction form
    80,905.76/121,173.60 = 71,445.36/x
  3. Step 3: Cross multiply
    80,905.76x = 121,173.60 × 71,445.36
  4. Step 4: Simplify right side
    80,905.76x = 8,657,291,474.50
  5. Step 5: Solve for x
    x = 8,657,291,474.50/80,905.76
  6. Step 6: Final answer
    x = 107,004.64

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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.