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Finding the Fourth Proportional to 78,603.88, 108,583.62 and 70,103.26

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Solution

The fourth proportional to 78,603.88, 108,583.62 and 70,103.26 is: 96,840.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,603.88 : 108,583.62 = 70,103.26 : x
  2. Step 2: Convert to fraction form
    78,603.88/108,583.62 = 70,103.26/x
  3. Step 3: Cross multiply
    78,603.88x = 108,583.62 × 70,103.26
  4. Step 4: Simplify right side
    78,603.88x = 7,612,065,744.60
  5. Step 5: Solve for x
    x = 7,612,065,744.60/78,603.88
  6. Step 6: Final answer
    x = 96,840.84

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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.