Home / 78,078.23-117,117.04-18,913.80

Finding the Fourth Proportional to 78,078.23, 117,117.04 and 18,913.80

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Solution

The fourth proportional to 78,078.23, 117,117.04 and 18,913.80 is: 28,370.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,078.23 : 117,117.04 = 18,913.80 : x
  2. Step 2: Convert to fraction form
    78,078.23/117,117.04 = 18,913.80/x
  3. Step 3: Cross multiply
    78,078.23x = 117,117.04 × 18,913.80
  4. Step 4: Simplify right side
    78,078.23x = 2,215,128,698.52
  5. Step 5: Solve for x
    x = 2,215,128,698.52/78,078.23
  6. Step 6: Final answer
    x = 28,370.63

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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.