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Finding the Fourth Proportional to 172,554.71, 258,613.97 and 77,683.86

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Solution

The fourth proportional to 172,554.71, 258,613.97 and 77,683.86 is: 116,427.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,554.71 : 258,613.97 = 77,683.86 : x
  2. Step 2: Convert to fraction form
    172,554.71/258,613.97 = 77,683.86/x
  3. Step 3: Cross multiply
    172,554.71x = 258,613.97 × 77,683.86
  4. Step 4: Simplify right side
    172,554.71x = 20,090,131,051.10
  5. Step 5: Solve for x
    x = 20,090,131,051.10/172,554.71
  6. Step 6: Final answer
    x = 116,427.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.