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Finding the Fourth Proportional to 189,771.58, 261,885.80 and 103,730.68

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Solution

The fourth proportional to 189,771.58, 261,885.80 and 103,730.68 is: 143,148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,771.58 : 261,885.80 = 103,730.68 : x
  2. Step 2: Convert to fraction form
    189,771.58/261,885.80 = 103,730.68/x
  3. Step 3: Cross multiply
    189,771.58x = 261,885.80 × 103,730.68
  4. Step 4: Simplify right side
    189,771.58x = 27,165,592,116.34
  5. Step 5: Solve for x
    x = 27,165,592,116.34/189,771.58
  6. Step 6: Final answer
    x = 143,148.90

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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.