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Finding the Fourth Proportional to 118,425, 163,426.50 and 68,124

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Solution

The fourth proportional to 118,425, 163,426.50 and 68,124 is: 94,011.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,425 : 163,426.50 = 68,124 : x
  2. Step 2: Convert to fraction form
    118,425/163,426.50 = 68,124/x
  3. Step 3: Cross multiply
    118,425x = 163,426.50 × 68,124
  4. Step 4: Simplify right side
    118,425x = 11,133,266,886
  5. Step 5: Solve for x
    x = 11,133,266,886/118,425
  6. Step 6: Final answer
    x = 94,011.12

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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.