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Finding the Fourth Proportional to 201,990.23, 278,746.43 and 111,347.67

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Solution

The fourth proportional to 201,990.23, 278,746.43 and 111,347.67 is: 153,659.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,990.23 : 278,746.43 = 111,347.67 : x
  2. Step 2: Convert to fraction form
    201,990.23/278,746.43 = 111,347.67/x
  3. Step 3: Cross multiply
    201,990.23x = 278,746.43 × 111,347.67
  4. Step 4: Simplify right side
    201,990.23x = 31,037,765,501.32
  5. Step 5: Solve for x
    x = 31,037,765,501.32/201,990.23
  6. Step 6: Final answer
    x = 153,659.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.