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Finding the Fourth Proportional to 121,751.76, 168,017.14 and 68,036.77

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Solution

The fourth proportional to 121,751.76, 168,017.14 and 68,036.77 is: 93,890.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,751.76 : 168,017.14 = 68,036.77 : x
  2. Step 2: Convert to fraction form
    121,751.76/168,017.14 = 68,036.77/x
  3. Step 3: Cross multiply
    121,751.76x = 168,017.14 × 68,036.77
  4. Step 4: Simplify right side
    121,751.76x = 11,431,342,950.05
  5. Step 5: Solve for x
    x = 11,431,342,950.05/121,751.76
  6. Step 6: Final answer
    x = 93,890.58

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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.