Home / 84,986,570.40-127,479,855.60-78,290,413.80

Finding the Fourth Proportional to 84,986,570.40, 127,479,855.60 and 78,290,413.80

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Solution

The fourth proportional to 84,986,570.40, 127,479,855.60 and 78,290,413.80 is: 117,435,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,986,570.40 : 127,479,855.60 = 78,290,413.80 : x
  2. Step 2: Convert to fraction form
    84,986,570.40/127,479,855.60 = 78,290,413.80/x
  3. Step 3: Cross multiply
    84,986,570.40x = 127,479,855.60 × 78,290,413.80
  4. Step 4: Simplify right side
    84,986,570.40x = 9,980,450,646,088,246
  5. Step 5: Solve for x
    x = 9,980,450,646,088,246/84,986,570.40
  6. Step 6: Final answer
    x = 117,435,620.70

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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.