Home / 78,150.93-117,225.53-18,986.64

Finding the Fourth Proportional to 78,150.93, 117,225.53 and 18,986.64

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Solution

The fourth proportional to 78,150.93, 117,225.53 and 18,986.64 is: 28,479.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,150.93 : 117,225.53 = 18,986.64 : x
  2. Step 2: Convert to fraction form
    78,150.93/117,225.53 = 18,986.64/x
  3. Step 3: Cross multiply
    78,150.93x = 117,225.53 × 18,986.64
  4. Step 4: Simplify right side
    78,150.93x = 2,225,718,473.59
  5. Step 5: Solve for x
    x = 2,225,718,473.59/78,150.93
  6. Step 6: Final answer
    x = 28,479.75

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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.