Home / 80,905.32-121,354.20-28,326.60

Finding the Fourth Proportional to 80,905.32, 121,354.20 and 28,326.60

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Solution

The fourth proportional to 80,905.32, 121,354.20 and 28,326.60 is: 42,488.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,905.32 : 121,354.20 = 28,326.60 : x
  2. Step 2: Convert to fraction form
    80,905.32/121,354.20 = 28,326.60/x
  3. Step 3: Cross multiply
    80,905.32x = 121,354.20 × 28,326.60
  4. Step 4: Simplify right side
    80,905.32x = 3,437,551,881.72
  5. Step 5: Solve for x
    x = 3,437,551,881.72/80,905.32
  6. Step 6: Final answer
    x = 42,488.58

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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.