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Finding the Fourth Proportional to 120,484.89, 180,789.30 and 57,376.58

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Solution

The fourth proportional to 120,484.89, 180,789.30 and 57,376.58 is: 86,094.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,484.89 : 180,789.30 = 57,376.58 : x
  2. Step 2: Convert to fraction form
    120,484.89/180,789.30 = 57,376.58/x
  3. Step 3: Cross multiply
    120,484.89x = 180,789.30 × 57,376.58
  4. Step 4: Simplify right side
    120,484.89x = 10,373,070,830.65
  5. Step 5: Solve for x
    x = 10,373,070,830.65/120,484.89
  6. Step 6: Final answer
    x = 86,094.37

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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.