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Finding the Fourth Proportional to 78,805.60, 118,187.60 and 39,333.60

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Solution

The fourth proportional to 78,805.60, 118,187.60 and 39,333.60 is: 58,990.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,805.60 : 118,187.60 = 39,333.60 : x
  2. Step 2: Convert to fraction form
    78,805.60/118,187.60 = 39,333.60/x
  3. Step 3: Cross multiply
    78,805.60x = 118,187.60 × 39,333.60
  4. Step 4: Simplify right side
    78,805.60x = 4,648,743,783.36
  5. Step 5: Solve for x
    x = 4,648,743,783.36/78,805.60
  6. Step 6: Final answer
    x = 58,990.02

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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.