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Finding the Fourth Proportional to 137,100.80, 189,200.40 and 79,743.08

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Solution

The fourth proportional to 137,100.80, 189,200.40 and 79,743.08 is: 110,046.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,100.80 : 189,200.40 = 79,743.08 : x
  2. Step 2: Convert to fraction form
    137,100.80/189,200.40 = 79,743.08/x
  3. Step 3: Cross multiply
    137,100.80x = 189,200.40 × 79,743.08
  4. Step 4: Simplify right side
    137,100.80x = 15,087,422,633.23
  5. Step 5: Solve for x
    x = 15,087,422,633.23/137,100.80
  6. Step 6: Final answer
    x = 110,046.20

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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.