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Finding the Fourth Proportional to 68,112.50, 102,168.75 and 18,864.50

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Solution

The fourth proportional to 68,112.50, 102,168.75 and 18,864.50 is: 28,296.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,112.50 : 102,168.75 = 18,864.50 : x
  2. Step 2: Convert to fraction form
    68,112.50/102,168.75 = 18,864.50/x
  3. Step 3: Cross multiply
    68,112.50x = 102,168.75 × 18,864.50
  4. Step 4: Simplify right side
    68,112.50x = 1,927,362,384.38
  5. Step 5: Solve for x
    x = 1,927,362,384.38/68,112.50
  6. Step 6: Final answer
    x = 28,296.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.