Home / 128,304,087.80-192,078,218.10-120,829,796.60

Finding the Fourth Proportional to 128,304,087.80, 192,078,218.10 and 120,829,796.60

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Solution

The fourth proportional to 128,304,087.80, 192,078,218.10 and 120,829,796.60 is: 180,888,796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,087.80 : 192,078,218.10 = 120,829,796.60 : x
  2. Step 2: Convert to fraction form
    128,304,087.80/192,078,218.10 = 120,829,796.60/x
  3. Step 3: Cross multiply
    128,304,087.80x = 192,078,218.10 × 120,829,796.60
  4. Step 4: Simplify right side
    128,304,087.80x = 23,208,772,024,313,436
  5. Step 5: Solve for x
    x = 23,208,772,024,313,436/128,304,087.80
  6. Step 6: Final answer
    x = 180,888,796.47

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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.