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Finding the Fourth Proportional to 111,970.93, 154,512.79 and 61,669.93

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Solution

The fourth proportional to 111,970.93, 154,512.79 and 61,669.93 is: 85,100.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,970.93 : 154,512.79 = 61,669.93 : x
  2. Step 2: Convert to fraction form
    111,970.93/154,512.79 = 61,669.93/x
  3. Step 3: Cross multiply
    111,970.93x = 154,512.79 × 61,669.93
  4. Step 4: Simplify right side
    111,970.93x = 9,528,792,943.40
  5. Step 5: Solve for x
    x = 9,528,792,943.40/111,970.93
  6. Step 6: Final answer
    x = 85,100.60

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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.