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Finding the Fourth Proportional to 79,081.60, 118,449.60 and 61,412.80

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Solution

The fourth proportional to 79,081.60, 118,449.60 and 61,412.80 is: 91,985.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,081.60 : 118,449.60 = 61,412.80 : x
  2. Step 2: Convert to fraction form
    79,081.60/118,449.60 = 61,412.80/x
  3. Step 3: Cross multiply
    79,081.60x = 118,449.60 × 61,412.80
  4. Step 4: Simplify right side
    79,081.60x = 7,274,321,594.88
  5. Step 5: Solve for x
    x = 7,274,321,594.88/79,081.60
  6. Step 6: Final answer
    x = 91,985.01

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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.