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Finding the Fourth Proportional to 118,616, 163,690.20 and 68,315.12

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Solution

The fourth proportional to 118,616, 163,690.20 and 68,315.12 is: 94,274.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,616 : 163,690.20 = 68,315.12 : x
  2. Step 2: Convert to fraction form
    118,616/163,690.20 = 68,315.12/x
  3. Step 3: Cross multiply
    118,616x = 163,690.20 × 68,315.12
  4. Step 4: Simplify right side
    118,616x = 11,182,515,655.82
  5. Step 5: Solve for x
    x = 11,182,515,655.82/118,616
  6. Step 6: Final answer
    x = 94,274.93

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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.