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Finding the Fourth Proportional to 118,808.80, 178,157.40 and 68,903.08

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Solution

The fourth proportional to 118,808.80, 178,157.40 and 68,903.08 is: 103,322.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,808.80 : 178,157.40 = 68,903.08 : x
  2. Step 2: Convert to fraction form
    118,808.80/178,157.40 = 68,903.08/x
  3. Step 3: Cross multiply
    118,808.80x = 178,157.40 × 68,903.08
  4. Step 4: Simplify right side
    118,808.80x = 12,275,593,584.79
  5. Step 5: Solve for x
    x = 12,275,593,584.79/118,808.80
  6. Step 6: Final answer
    x = 103,322.26

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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.