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Finding the Fourth Proportional to 189,718.61, 261,866.12 and 125,234.91

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Solution

The fourth proportional to 189,718.61, 261,866.12 and 125,234.91 is: 172,860.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,718.61 : 261,866.12 = 125,234.91 : x
  2. Step 2: Convert to fraction form
    189,718.61/261,866.12 = 125,234.91/x
  3. Step 3: Cross multiply
    189,718.61x = 261,866.12 × 125,234.91
  4. Step 4: Simplify right side
    189,718.61x = 32,794,779,344.07
  5. Step 5: Solve for x
    x = 32,794,779,344.07/189,718.61
  6. Step 6: Final answer
    x = 172,860.11

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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.