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Finding the Fourth Proportional to 68,598.34, 102,903.66 and 18,678.70

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Solution

The fourth proportional to 68,598.34, 102,903.66 and 18,678.70 is: 28,019.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,598.34 : 102,903.66 = 18,678.70 : x
  2. Step 2: Convert to fraction form
    68,598.34/102,903.66 = 18,678.70/x
  3. Step 3: Cross multiply
    68,598.34x = 102,903.66 × 18,678.70
  4. Step 4: Simplify right side
    68,598.34x = 1,922,106,594.04
  5. Step 5: Solve for x
    x = 1,922,106,594.04/68,598.34
  6. Step 6: Final answer
    x = 28,019.72

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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.