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Finding the Fourth Proportional to 111,856, 154,361.80 and 64,112.16

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Solution

The fourth proportional to 111,856, 154,361.80 and 64,112.16 is: 88,475.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,856 : 154,361.80 = 64,112.16 : x
  2. Step 2: Convert to fraction form
    111,856/154,361.80 = 64,112.16/x
  3. Step 3: Cross multiply
    111,856x = 154,361.80 × 64,112.16
  4. Step 4: Simplify right side
    111,856x = 9,896,468,419.49
  5. Step 5: Solve for x
    x = 9,896,468,419.49/111,856
  6. Step 6: Final answer
    x = 88,475.08

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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.