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Finding the Fourth Proportional to 265,798,108.80, 398,771,812.80 and 129,487,939.20

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Solution

The fourth proportional to 265,798,108.80, 398,771,812.80 and 129,487,939.20 is: 194,268,275.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,798,108.80 : 398,771,812.80 = 129,487,939.20 : x
  2. Step 2: Convert to fraction form
    265,798,108.80/398,771,812.80 = 129,487,939.20/x
  3. Step 3: Cross multiply
    265,798,108.80x = 398,771,812.80 × 129,487,939.20
  4. Step 4: Simplify right side
    265,798,108.80x = 51,636,140,250,520,184
  5. Step 5: Solve for x
    x = 51,636,140,250,520,184/265,798,108.80
  6. Step 6: Final answer
    x = 194,268,275.59

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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.