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Finding the Fourth Proportional to 120,576.60, 180,762.84 and 45,655.45

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Solution

The fourth proportional to 120,576.60, 180,762.84 and 45,655.45 is: 68,444.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,576.60 : 180,762.84 = 45,655.45 : x
  2. Step 2: Convert to fraction form
    120,576.60/180,762.84 = 45,655.45/x
  3. Step 3: Cross multiply
    120,576.60x = 180,762.84 × 45,655.45
  4. Step 4: Simplify right side
    120,576.60x = 8,252,808,351.57
  5. Step 5: Solve for x
    x = 8,252,808,351.57/120,576.60
  6. Step 6: Final answer
    x = 68,444.53

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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.