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Finding the Fourth Proportional to 265,798,221.80, 398,771,982.30 and 129,488,052.20

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Solution

The fourth proportional to 265,798,221.80, 398,771,982.30 and 129,488,052.20 is: 194,268,445.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,798,221.80 : 398,771,982.30 = 129,488,052.20 : x
  2. Step 2: Convert to fraction form
    265,798,221.80/398,771,982.30 = 129,488,052.20/x
  3. Step 3: Cross multiply
    265,798,221.80x = 398,771,982.30 × 129,488,052.20
  4. Step 4: Simplify right side
    265,798,221.80x = 51,636,207,259,959,880
  5. Step 5: Solve for x
    x = 51,636,207,259,959,880/265,798,221.80
  6. Step 6: Final answer
    x = 194,268,445.10

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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.