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Finding the Fourth Proportional to 209,969,312.80, 314,911,978.80 and 100,794,272.80

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Solution

The fourth proportional to 209,969,312.80, 314,911,978.80 and 100,794,272.80 is: 151,171,252.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,969,312.80 : 314,911,978.80 = 100,794,272.80 : x
  2. Step 2: Convert to fraction form
    209,969,312.80/314,911,978.80 = 100,794,272.80/x
  3. Step 3: Cross multiply
    209,969,312.80x = 314,911,978.80 × 100,794,272.80
  4. Step 4: Simplify right side
    209,969,312.80x = 31,741,323,899,155,016
  5. Step 5: Solve for x
    x = 31,741,323,899,155,016/209,969,312.80
  6. Step 6: Final answer
    x = 151,171,252.01

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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.