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Finding the Fourth Proportional to 118,895.20, 178,051.20 and 79,237.60

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Solution

The fourth proportional to 118,895.20, 178,051.20 and 79,237.60 is: 118,662.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,895.20 : 178,051.20 = 79,237.60 : x
  2. Step 2: Convert to fraction form
    118,895.20/178,051.20 = 79,237.60/x
  3. Step 3: Cross multiply
    118,895.20x = 178,051.20 × 79,237.60
  4. Step 4: Simplify right side
    118,895.20x = 14,108,349,765.12
  5. Step 5: Solve for x
    x = 14,108,349,765.12/118,895.20
  6. Step 6: Final answer
    x = 118,662.06

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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.