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Finding the Fourth Proportional to 111,126.60, 166,689.90 and 81,602.10

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Solution

The fourth proportional to 111,126.60, 166,689.90 and 81,602.10 is: 122,403.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,126.60 : 166,689.90 = 81,602.10 : x
  2. Step 2: Convert to fraction form
    111,126.60/166,689.90 = 81,602.10/x
  3. Step 3: Cross multiply
    111,126.60x = 166,689.90 × 81,602.10
  4. Step 4: Simplify right side
    111,126.60x = 13,602,245,888.79
  5. Step 5: Solve for x
    x = 13,602,245,888.79/111,126.60
  6. Step 6: Final answer
    x = 122,403.15

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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.