Home / 78,270.32-117,403.74-19,105.80

Finding the Fourth Proportional to 78,270.32, 117,403.74 and 19,105.80

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Solution

The fourth proportional to 78,270.32, 117,403.74 and 19,105.80 is: 28,658.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,270.32 : 117,403.74 = 19,105.80 : x
  2. Step 2: Convert to fraction form
    78,270.32/117,403.74 = 19,105.80/x
  3. Step 3: Cross multiply
    78,270.32x = 117,403.74 × 19,105.80
  4. Step 4: Simplify right side
    78,270.32x = 2,243,092,375.69
  5. Step 5: Solve for x
    x = 2,243,092,375.69/78,270.32
  6. Step 6: Final answer
    x = 28,658.28

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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.