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Finding the Fourth Proportional to 111,840.70, 154,314.80 and 81,642.46

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Solution

The fourth proportional to 111,840.70, 154,314.80 and 81,642.46 is: 112,648.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,840.70 : 154,314.80 = 81,642.46 : x
  2. Step 2: Convert to fraction form
    111,840.70/154,314.80 = 81,642.46/x
  3. Step 3: Cross multiply
    111,840.70x = 154,314.80 × 81,642.46
  4. Step 4: Simplify right side
    111,840.70x = 12,598,639,886.41
  5. Step 5: Solve for x
    x = 12,598,639,886.41/111,840.70
  6. Step 6: Final answer
    x = 112,648.08

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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.