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Finding the Fourth Proportional to 156,990.60, 216,708.65 and 111,289.12

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Solution

The fourth proportional to 156,990.60, 216,708.65 and 111,289.12 is: 153,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,990.60 : 216,708.65 = 111,289.12 : x
  2. Step 2: Convert to fraction form
    156,990.60/216,708.65 = 111,289.12/x
  3. Step 3: Cross multiply
    156,990.60x = 216,708.65 × 111,289.12
  4. Step 4: Simplify right side
    156,990.60x = 24,117,314,954.89
  5. Step 5: Solve for x
    x = 24,117,314,954.89/156,990.60
  6. Step 6: Final answer
    x = 153,622.67

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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.