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Finding the Fourth Proportional to 80,442.88, 120,489.28 and 54,030.40

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Solution

The fourth proportional to 80,442.88, 120,489.28 and 54,030.40 is: 80,928.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,442.88 : 120,489.28 = 54,030.40 : x
  2. Step 2: Convert to fraction form
    80,442.88/120,489.28 = 54,030.40/x
  3. Step 3: Cross multiply
    80,442.88x = 120,489.28 × 54,030.40
  4. Step 4: Simplify right side
    80,442.88x = 6,510,083,994.11
  5. Step 5: Solve for x
    x = 6,510,083,994.11/80,442.88
  6. Step 6: Final answer
    x = 80,928.03

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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.