Home / 80,394.50-120,664.02-42,986.55

Finding the Fourth Proportional to 80,394.50, 120,664.02 and 42,986.55

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Solution

The fourth proportional to 80,394.50, 120,664.02 and 42,986.55 is: 64,518.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,394.50 : 120,664.02 = 42,986.55 : x
  2. Step 2: Convert to fraction form
    80,394.50/120,664.02 = 42,986.55/x
  3. Step 3: Cross multiply
    80,394.50x = 120,664.02 × 42,986.55
  4. Step 4: Simplify right side
    80,394.50x = 5,186,929,833.66
  5. Step 5: Solve for x
    x = 5,186,929,833.66/80,394.50
  6. Step 6: Final answer
    x = 64,518.47

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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.