Home / 81,078.04-121,672.43-28,487.53

Finding the Fourth Proportional to 81,078.04, 121,672.43 and 28,487.53

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Solution

The fourth proportional to 81,078.04, 121,672.43 and 28,487.53 is: 42,750.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,078.04 : 121,672.43 = 28,487.53 : x
  2. Step 2: Convert to fraction form
    81,078.04/121,672.43 = 28,487.53/x
  3. Step 3: Cross multiply
    81,078.04x = 121,672.43 × 28,487.53
  4. Step 4: Simplify right side
    81,078.04x = 3,466,146,999.80
  5. Step 5: Solve for x
    x = 3,466,146,999.80/81,078.04
  6. Step 6: Final answer
    x = 42,750.75

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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.