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Finding the Fourth Proportional to 189,432.50, 261,450.71 and 112,956.51

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Solution

The fourth proportional to 189,432.50, 261,450.71 and 112,956.51 is: 155,900.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,432.50 : 261,450.71 = 112,956.51 : x
  2. Step 2: Convert to fraction form
    189,432.50/261,450.71 = 112,956.51/x
  3. Step 3: Cross multiply
    189,432.50x = 261,450.71 × 112,956.51
  4. Step 4: Simplify right side
    189,432.50x = 29,532,559,173.84
  5. Step 5: Solve for x
    x = 29,532,559,173.84/189,432.50
  6. Step 6: Final answer
    x = 155,900.18

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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.