Home / 78,351,339.20-117,527,008.80-65,810,206.40

Finding the Fourth Proportional to 78,351,339.20, 117,527,008.80 and 65,810,206.40

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Solution

The fourth proportional to 78,351,339.20, 117,527,008.80 and 65,810,206.40 is: 98,715,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,351,339.20 : 117,527,008.80 = 65,810,206.40 : x
  2. Step 2: Convert to fraction form
    78,351,339.20/117,527,008.80 = 65,810,206.40/x
  3. Step 3: Cross multiply
    78,351,339.20x = 117,527,008.80 × 65,810,206.40
  4. Step 4: Simplify right side
    78,351,339.20x = 7,734,476,706,702,616
  5. Step 5: Solve for x
    x = 7,734,476,706,702,616/78,351,339.20
  6. Step 6: Final answer
    x = 98,715,309.60

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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.