Home / 91,993,795.20-137,990,692.80-78,315,422.40

Finding the Fourth Proportional to 91,993,795.20, 137,990,692.80 and 78,315,422.40

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Solution

The fourth proportional to 91,993,795.20, 137,990,692.80 and 78,315,422.40 is: 117,473,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,993,795.20 : 137,990,692.80 = 78,315,422.40 : x
  2. Step 2: Convert to fraction form
    91,993,795.20/137,990,692.80 = 78,315,422.40/x
  3. Step 3: Cross multiply
    91,993,795.20x = 137,990,692.80 × 78,315,422.40
  4. Step 4: Simplify right side
    91,993,795.20x = 10,806,799,393,900,640
  5. Step 5: Solve for x
    x = 10,806,799,393,900,640/91,993,795.20
  6. Step 6: Final answer
    x = 117,473,133.60

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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.