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Finding the Fourth Proportional to 78,130.80, 107,837.28 and 50,940.88

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Solution

The fourth proportional to 78,130.80, 107,837.28 and 50,940.88 is: 70,309.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,130.80 : 107,837.28 = 50,940.88 : x
  2. Step 2: Convert to fraction form
    78,130.80/107,837.28 = 50,940.88/x
  3. Step 3: Cross multiply
    78,130.80x = 107,837.28 × 50,940.88
  4. Step 4: Simplify right side
    78,130.80x = 5,493,325,940.01
  5. Step 5: Solve for x
    x = 5,493,325,940.01/78,130.80
  6. Step 6: Final answer
    x = 70,309.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.