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Finding the Fourth Proportional to 78,879.60, 118,335.60 and 26,326.80

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Solution

The fourth proportional to 78,879.60, 118,335.60 and 26,326.80 is: 39,495.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,879.60 : 118,335.60 = 26,326.80 : x
  2. Step 2: Convert to fraction form
    78,879.60/118,335.60 = 26,326.80/x
  3. Step 3: Cross multiply
    78,879.60x = 118,335.60 × 26,326.80
  4. Step 4: Simplify right side
    78,879.60x = 3,115,397,674.08
  5. Step 5: Solve for x
    x = 3,115,397,674.08/78,879.60
  6. Step 6: Final answer
    x = 39,495.61

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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.