Home / 78,272.16-117,409.36-19,108.94

Finding the Fourth Proportional to 78,272.16, 117,409.36 and 19,108.94

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Solution

The fourth proportional to 78,272.16, 117,409.36 and 19,108.94 is: 28,663.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,272.16 : 117,409.36 = 19,108.94 : x
  2. Step 2: Convert to fraction form
    78,272.16/117,409.36 = 19,108.94/x
  3. Step 3: Cross multiply
    78,272.16x = 117,409.36 × 19,108.94
  4. Step 4: Simplify right side
    78,272.16x = 2,243,568,415.68
  5. Step 5: Solve for x
    x = 2,243,568,415.68/78,272.16
  6. Step 6: Final answer
    x = 28,663.68

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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.