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Finding the Fourth Proportional to 78,850.80, 118,276.20 and 56,818.80

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Solution

The fourth proportional to 78,850.80, 118,276.20 and 56,818.80 is: 85,228.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,850.80 : 118,276.20 = 56,818.80 : x
  2. Step 2: Convert to fraction form
    78,850.80/118,276.20 = 56,818.80/x
  3. Step 3: Cross multiply
    78,850.80x = 118,276.20 × 56,818.80
  4. Step 4: Simplify right side
    78,850.80x = 6,720,311,752.56
  5. Step 5: Solve for x
    x = 6,720,311,752.56/78,850.80
  6. Step 6: Final answer
    x = 85,228.20

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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.