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Finding the Fourth Proportional to 118,426, 163,427.88 and 68,125

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Solution

The fourth proportional to 118,426, 163,427.88 and 68,125 is: 94,012.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,426 : 163,427.88 = 68,125 : x
  2. Step 2: Convert to fraction form
    118,426/163,427.88 = 68,125/x
  3. Step 3: Cross multiply
    118,426x = 163,427.88 × 68,125
  4. Step 4: Simplify right side
    118,426x = 11,133,524,325
  5. Step 5: Solve for x
    x = 11,133,524,325/118,426
  6. Step 6: Final answer
    x = 94,012.50

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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.