Home / 78,816.20-118,224.30-77,520.20

Finding the Fourth Proportional to 78,816.20, 118,224.30 and 77,520.20

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Solution

The fourth proportional to 78,816.20, 118,224.30 and 77,520.20 is: 116,280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,816.20 : 118,224.30 = 77,520.20 : x
  2. Step 2: Convert to fraction form
    78,816.20/118,224.30 = 77,520.20/x
  3. Step 3: Cross multiply
    78,816.20x = 118,224.30 × 77,520.20
  4. Step 4: Simplify right side
    78,816.20x = 9,164,771,380.86
  5. Step 5: Solve for x
    x = 9,164,771,380.86/78,816.20
  6. Step 6: Final answer
    x = 116,280.30

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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.