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Finding the Fourth Proportional to 118,870.96, 178,464.81 and 68,986.87

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Solution

The fourth proportional to 118,870.96, 178,464.81 and 68,986.87 is: 103,572.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,870.96 : 178,464.81 = 68,986.87 : x
  2. Step 2: Convert to fraction form
    118,870.96/178,464.81 = 68,986.87/x
  3. Step 3: Cross multiply
    118,870.96x = 178,464.81 × 68,986.87
  4. Step 4: Simplify right side
    118,870.96x = 12,311,728,647.04
  5. Step 5: Solve for x
    x = 12,311,728,647.04/118,870.96
  6. Step 6: Final answer
    x = 103,572.22

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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.