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Finding the Fourth Proportional to 113,091.45, 156,055.15 and 65,343.78

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Solution

The fourth proportional to 113,091.45, 156,055.15 and 65,343.78 is: 90,168.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,091.45 : 156,055.15 = 65,343.78 : x
  2. Step 2: Convert to fraction form
    113,091.45/156,055.15 = 65,343.78/x
  3. Step 3: Cross multiply
    113,091.45x = 156,055.15 × 65,343.78
  4. Step 4: Simplify right side
    113,091.45x = 10,197,233,389.47
  5. Step 5: Solve for x
    x = 10,197,233,389.47/113,091.45
  6. Step 6: Final answer
    x = 90,168.03

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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.