Home / 128,628,266.80-192,942,400.20-74,208,708.40

Finding the Fourth Proportional to 128,628,266.80, 192,942,400.20 and 74,208,708.40

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Solution

The fourth proportional to 128,628,266.80, 192,942,400.20 and 74,208,708.40 is: 111,313,062.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,628,266.80 : 192,942,400.20 = 74,208,708.40 : x
  2. Step 2: Convert to fraction form
    128,628,266.80/192,942,400.20 = 74,208,708.40/x
  3. Step 3: Cross multiply
    128,628,266.80x = 192,942,400.20 × 74,208,708.40
  4. Step 4: Simplify right side
    128,628,266.80x = 14,318,006,314,437,902
  5. Step 5: Solve for x
    x = 14,318,006,314,437,902/128,628,266.80
  6. Step 6: Final answer
    x = 111,313,062.60

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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.