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Finding the Fourth Proportional to 120,618.76, 180,893.58 and 40,648

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Solution

The fourth proportional to 120,618.76, 180,893.58 and 40,648 is: 60,960.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,618.76 : 180,893.58 = 40,648 : x
  2. Step 2: Convert to fraction form
    120,618.76/180,893.58 = 40,648/x
  3. Step 3: Cross multiply
    120,618.76x = 180,893.58 × 40,648
  4. Step 4: Simplify right side
    120,618.76x = 7,352,962,239.84
  5. Step 5: Solve for x
    x = 7,352,962,239.84/120,618.76
  6. Step 6: Final answer
    x = 60,960.35

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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.