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Finding the Fourth Proportional to 120,615.85, 180,881.95 and 49,518.30

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Solution

The fourth proportional to 120,615.85, 180,881.95 and 49,518.30 is: 74,260.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,615.85 : 180,881.95 = 49,518.30 : x
  2. Step 2: Convert to fraction form
    120,615.85/180,881.95 = 49,518.30/x
  3. Step 3: Cross multiply
    120,615.85x = 180,881.95 × 49,518.30
  4. Step 4: Simplify right side
    120,615.85x = 8,956,966,664.69
  5. Step 5: Solve for x
    x = 8,956,966,664.69/120,615.85
  6. Step 6: Final answer
    x = 74,260.28

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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.