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Finding the Fourth Proportional to 78,887.20, 118,201.20 and 74,221.60

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Solution

The fourth proportional to 78,887.20, 118,201.20 and 74,221.60 is: 111,210.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,887.20 : 118,201.20 = 74,221.60 : x
  2. Step 2: Convert to fraction form
    78,887.20/118,201.20 = 74,221.60/x
  3. Step 3: Cross multiply
    78,887.20x = 118,201.20 × 74,221.60
  4. Step 4: Simplify right side
    78,887.20x = 8,773,082,185.92
  5. Step 5: Solve for x
    x = 8,773,082,185.92/78,887.20
  6. Step 6: Final answer
    x = 111,210.46

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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.