Home / 388,653,620.80-583,010,570.40-129,869,766.40

Finding the Fourth Proportional to 388,653,620.80, 583,010,570.40 and 129,869,766.40

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Solution

The fourth proportional to 388,653,620.80, 583,010,570.40 and 129,869,766.40 is: 194,814,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,653,620.80 : 583,010,570.40 = 129,869,766.40 : x
  2. Step 2: Convert to fraction form
    388,653,620.80/583,010,570.40 = 129,869,766.40/x
  3. Step 3: Cross multiply
    388,653,620.80x = 583,010,570.40 × 129,869,766.40
  4. Step 4: Simplify right side
    388,653,620.80x = 75,715,446,586,578,752
  5. Step 5: Solve for x
    x = 75,715,446,586,578,752/388,653,620.80
  6. Step 6: Final answer
    x = 194,814,720.70

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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.