Home / 128,304,934.80-192,079,488.60-120,830,643.60

Finding the Fourth Proportional to 128,304,934.80, 192,079,488.60 and 120,830,643.60

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Solution

The fourth proportional to 128,304,934.80, 192,079,488.60 and 120,830,643.60 is: 180,890,066.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,934.80 : 192,079,488.60 = 120,830,643.60 : x
  2. Step 2: Convert to fraction form
    128,304,934.80/192,079,488.60 = 120,830,643.60/x
  3. Step 3: Cross multiply
    128,304,934.80x = 192,079,488.60 × 120,830,643.60
  4. Step 4: Simplify right side
    128,304,934.80x = 23,209,088,229,896,860
  5. Step 5: Solve for x
    x = 23,209,088,229,896,860/128,304,934.80
  6. Step 6: Final answer
    x = 180,890,066.82

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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.