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Finding the Fourth Proportional to 139,885.57, 193,041.79 and 76,223.22

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Solution

The fourth proportional to 139,885.57, 193,041.79 and 76,223.22 is: 105,187.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,885.57 : 193,041.79 = 76,223.22 : x
  2. Step 2: Convert to fraction form
    139,885.57/193,041.79 = 76,223.22/x
  3. Step 3: Cross multiply
    139,885.57x = 193,041.79 × 76,223.22
  4. Step 4: Simplify right side
    139,885.57x = 14,714,266,828.36
  5. Step 5: Solve for x
    x = 14,714,266,828.36/139,885.57
  6. Step 6: Final answer
    x = 105,187.88

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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.