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Finding the Fourth Proportional to 189,803.12, 261,916.92 and 104,915.12

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Solution

The fourth proportional to 189,803.12, 261,916.92 and 104,915.12 is: 144,776.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,803.12 : 261,916.92 = 104,915.12 : x
  2. Step 2: Convert to fraction form
    189,803.12/261,916.92 = 104,915.12/x
  3. Step 3: Cross multiply
    189,803.12x = 261,916.92 × 104,915.12
  4. Step 4: Simplify right side
    189,803.12x = 27,479,045,091.83
  5. Step 5: Solve for x
    x = 27,479,045,091.83/189,803.12
  6. Step 6: Final answer
    x = 144,776.57

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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.