Home / 78,976,928.80-118,465,393.20-65,540,000.80

Finding the Fourth Proportional to 78,976,928.80, 118,465,393.20 and 65,540,000.80

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Solution

The fourth proportional to 78,976,928.80, 118,465,393.20 and 65,540,000.80 is: 98,310,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,976,928.80 : 118,465,393.20 = 65,540,000.80 : x
  2. Step 2: Convert to fraction form
    78,976,928.80/118,465,393.20 = 65,540,000.80/x
  3. Step 3: Cross multiply
    78,976,928.80x = 118,465,393.20 × 65,540,000.80
  4. Step 4: Simplify right side
    78,976,928.80x = 7,764,221,965,100,314
  5. Step 5: Solve for x
    x = 7,764,221,965,100,314/78,976,928.80
  6. Step 6: Final answer
    x = 98,310,001.20

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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.