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Finding the Fourth Proportional to 111,583.82, 153,988.35 and 61,283.90

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Solution

The fourth proportional to 111,583.82, 153,988.35 and 61,283.90 is: 84,573.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,583.82 : 153,988.35 = 61,283.90 : x
  2. Step 2: Convert to fraction form
    111,583.82/153,988.35 = 61,283.90/x
  3. Step 3: Cross multiply
    111,583.82x = 153,988.35 × 61,283.90
  4. Step 4: Simplify right side
    111,583.82x = 9,437,006,642.57
  5. Step 5: Solve for x
    x = 9,437,006,642.57/111,583.82
  6. Step 6: Final answer
    x = 84,573.25

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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.