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Finding the Fourth Proportional to 121,107.51, 181,411.11 and 71,036.82

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Solution

The fourth proportional to 121,107.51, 181,411.11 and 71,036.82 is: 106,408.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,107.51 : 181,411.11 = 71,036.82 : x
  2. Step 2: Convert to fraction form
    121,107.51/181,411.11 = 71,036.82/x
  3. Step 3: Cross multiply
    121,107.51x = 181,411.11 × 71,036.82
  4. Step 4: Simplify right side
    121,107.51x = 12,886,868,367.07
  5. Step 5: Solve for x
    x = 12,886,868,367.07/121,107.51
  6. Step 6: Final answer
    x = 106,408.50

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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.