Home / 78,351,413.20-117,527,119.80-65,810,280.40

Finding the Fourth Proportional to 78,351,413.20, 117,527,119.80 and 65,810,280.40

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Solution

The fourth proportional to 78,351,413.20, 117,527,119.80 and 65,810,280.40 is: 98,715,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,351,413.20 : 117,527,119.80 = 65,810,280.40 : x
  2. Step 2: Convert to fraction form
    78,351,413.20/117,527,119.80 = 65,810,280.40/x
  3. Step 3: Cross multiply
    78,351,413.20x = 117,527,119.80 × 65,810,280.40
  4. Step 4: Simplify right side
    78,351,413.20x = 7,734,492,708,642,392
  5. Step 5: Solve for x
    x = 7,734,492,708,642,392/78,351,413.20
  6. Step 6: Final answer
    x = 98,715,420.60

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1.5x scale

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.