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Finding the Fourth Proportional to 111,162.40, 153,426.80 and 75,363.92

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Solution

The fourth proportional to 111,162.40, 153,426.80 and 75,363.92 is: 104,017.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,162.40 : 153,426.80 = 75,363.92 : x
  2. Step 2: Convert to fraction form
    111,162.40/153,426.80 = 75,363.92/x
  3. Step 3: Cross multiply
    111,162.40x = 153,426.80 × 75,363.92
  4. Step 4: Simplify right side
    111,162.40x = 11,562,845,081.06
  5. Step 5: Solve for x
    x = 11,562,845,081.06/111,162.40
  6. Step 6: Final answer
    x = 104,017.59

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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.