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Finding the Fourth Proportional to 78,808.80, 118,213.20 and 26,223.60

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Solution

The fourth proportional to 78,808.80, 118,213.20 and 26,223.60 is: 39,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,808.80 : 118,213.20 = 26,223.60 : x
  2. Step 2: Convert to fraction form
    78,808.80/118,213.20 = 26,223.60/x
  3. Step 3: Cross multiply
    78,808.80x = 118,213.20 × 26,223.60
  4. Step 4: Simplify right side
    78,808.80x = 3,099,975,671.52
  5. Step 5: Solve for x
    x = 3,099,975,671.52/78,808.80
  6. Step 6: Final answer
    x = 39,335.40

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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.