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Finding the Fourth Proportional to 128,266.80, 192,659.40 and 123,860.40

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Solution

The fourth proportional to 128,266.80, 192,659.40 and 123,860.40 is: 186,040.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,266.80 : 192,659.40 = 123,860.40 : x
  2. Step 2: Convert to fraction form
    128,266.80/192,659.40 = 123,860.40/x
  3. Step 3: Cross multiply
    128,266.80x = 192,659.40 × 123,860.40
  4. Step 4: Simplify right side
    128,266.80x = 23,862,870,347.76
  5. Step 5: Solve for x
    x = 23,862,870,347.76/128,266.80
  6. Step 6: Final answer
    x = 186,040.90

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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.