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Finding the Fourth Proportional to 105,991.06, 158,640.45 and 77,903.68

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Solution

The fourth proportional to 105,991.06, 158,640.45 and 77,903.68 is: 116,601.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,991.06 : 158,640.45 = 77,903.68 : x
  2. Step 2: Convert to fraction form
    105,991.06/158,640.45 = 77,903.68/x
  3. Step 3: Cross multiply
    105,991.06x = 158,640.45 × 77,903.68
  4. Step 4: Simplify right side
    105,991.06x = 12,358,674,851.86
  5. Step 5: Solve for x
    x = 12,358,674,851.86/105,991.06
  6. Step 6: Final answer
    x = 116,601.11

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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.