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Finding the Fourth Proportional to 120,000.30, 180,000.45 and 118,250.70

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Solution

The fourth proportional to 120,000.30, 180,000.45 and 118,250.70 is: 177,376.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,000.30 : 180,000.45 = 118,250.70 : x
  2. Step 2: Convert to fraction form
    120,000.30/180,000.45 = 118,250.70/x
  3. Step 3: Cross multiply
    120,000.30x = 180,000.45 × 118,250.70
  4. Step 4: Simplify right side
    120,000.30x = 21,285,179,212.82
  5. Step 5: Solve for x
    x = 21,285,179,212.82/120,000.30
  6. Step 6: Final answer
    x = 177,376.05

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1.5x scale

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.