Home / 145,987.20-218,829.60-79,286.40

Finding the Fourth Proportional to 145,987.20, 218,829.60 and 79,286.40

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Solution

The fourth proportional to 145,987.20, 218,829.60 and 79,286.40 is: 118,847.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,987.20 : 218,829.60 = 79,286.40 : x
  2. Step 2: Convert to fraction form
    145,987.20/218,829.60 = 79,286.40/x
  3. Step 3: Cross multiply
    145,987.20x = 218,829.60 × 79,286.40
  4. Step 4: Simplify right side
    145,987.20x = 17,350,211,197.44
  5. Step 5: Solve for x
    x = 17,350,211,197.44/145,987.20
  6. Step 6: Final answer
    x = 118,847.48

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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.