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Finding the Fourth Proportional to 251,688.70, 347,333.97 and 136,970.83

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Solution

The fourth proportional to 251,688.70, 347,333.97 and 136,970.83 is: 189,021.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,688.70 : 347,333.97 = 136,970.83 : x
  2. Step 2: Convert to fraction form
    251,688.70/347,333.97 = 136,970.83/x
  3. Step 3: Cross multiply
    251,688.70x = 347,333.97 × 136,970.83
  4. Step 4: Simplify right side
    251,688.70x = 47,574,622,158.10
  5. Step 5: Solve for x
    x = 47,574,622,158.10/251,688.70
  6. Step 6: Final answer
    x = 189,021.68

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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.