Home / 78,440.09-117,659.10-19,276.28

Finding the Fourth Proportional to 78,440.09, 117,659.10 and 19,276.28

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Solution

The fourth proportional to 78,440.09, 117,659.10 and 19,276.28 is: 28,914.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.09 : 117,659.10 = 19,276.28 : x
  2. Step 2: Convert to fraction form
    78,440.09/117,659.10 = 19,276.28/x
  3. Step 3: Cross multiply
    78,440.09x = 117,659.10 × 19,276.28
  4. Step 4: Simplify right side
    78,440.09x = 2,268,029,167.85
  5. Step 5: Solve for x
    x = 2,268,029,167.85/78,440.09
  6. Step 6: Final answer
    x = 28,914.16

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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.