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Finding the Fourth Proportional to 113,939.64, 157,209.90 and 66,164.28

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Solution

The fourth proportional to 113,939.64, 157,209.90 and 66,164.28 is: 91,291.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,939.64 : 157,209.90 = 66,164.28 : x
  2. Step 2: Convert to fraction form
    113,939.64/157,209.90 = 66,164.28/x
  3. Step 3: Cross multiply
    113,939.64x = 157,209.90 × 66,164.28
  4. Step 4: Simplify right side
    113,939.64x = 10,401,679,842.37
  5. Step 5: Solve for x
    x = 10,401,679,842.37/113,939.64
  6. Step 6: Final answer
    x = 91,291.14

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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.