Home / 126,965,509.20-190,448,263.80-78,285,513.60

Finding the Fourth Proportional to 126,965,509.20, 190,448,263.80 and 78,285,513.60

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Solution

The fourth proportional to 126,965,509.20, 190,448,263.80 and 78,285,513.60 is: 117,428,270.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,965,509.20 : 190,448,263.80 = 78,285,513.60 : x
  2. Step 2: Convert to fraction form
    126,965,509.20/190,448,263.80 = 78,285,513.60/x
  3. Step 3: Cross multiply
    126,965,509.20x = 190,448,263.80 × 78,285,513.60
  4. Step 4: Simplify right side
    126,965,509.20x = 14,909,340,145,811,288
  5. Step 5: Solve for x
    x = 14,909,340,145,811,288/126,965,509.20
  6. Step 6: Final answer
    x = 117,428,270.40

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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.