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Finding the Fourth Proportional to 188,861.80, 282,990.30 and 99,999.40

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Solution

The fourth proportional to 188,861.80, 282,990.30 and 99,999.40 is: 149,838.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,861.80 : 282,990.30 = 99,999.40 : x
  2. Step 2: Convert to fraction form
    188,861.80/282,990.30 = 99,999.40/x
  3. Step 3: Cross multiply
    188,861.80x = 282,990.30 × 99,999.40
  4. Step 4: Simplify right side
    188,861.80x = 28,298,860,205.82
  5. Step 5: Solve for x
    x = 28,298,860,205.82/188,861.80
  6. Step 6: Final answer
    x = 149,838.98

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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.