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Finding the Fourth Proportional to 118,424, 163,425.12 and 68,123

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Solution

The fourth proportional to 118,424, 163,425.12 and 68,123 is: 94,009.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,424 : 163,425.12 = 68,123 : x
  2. Step 2: Convert to fraction form
    118,424/163,425.12 = 68,123/x
  3. Step 3: Cross multiply
    118,424x = 163,425.12 × 68,123
  4. Step 4: Simplify right side
    118,424x = 11,133,009,449.76
  5. Step 5: Solve for x
    x = 11,133,009,449.76/118,424
  6. Step 6: Final answer
    x = 94,009.74

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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.