Home / 388,667,819.13-583,001,728.71-129,883,039.36

Finding the Fourth Proportional to 388,667,819.13, 583,001,728.71 and 129,883,039.36

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Solution

The fourth proportional to 388,667,819.13, 583,001,728.71 and 129,883,039.36 is: 194,824,559.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,667,819.13 : 583,001,728.71 = 129,883,039.36 : x
  2. Step 2: Convert to fraction form
    388,667,819.13/583,001,728.71 = 129,883,039.36/x
  3. Step 3: Cross multiply
    388,667,819.13x = 583,001,728.71 × 129,883,039.36
  4. Step 4: Simplify right side
    388,667,819.13x = 75,722,036,476,988,976
  5. Step 5: Solve for x
    x = 75,722,036,476,988,976/388,667,819.13
  6. Step 6: Final answer
    x = 194,824,559.05

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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.