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Finding the Fourth Proportional to 265,863,087.65, 398,853,921.04 and 81,649,154.58

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Solution

The fourth proportional to 265,863,087.65, 398,853,921.04 and 81,649,154.58 is: 122,491,940.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,863,087.65 : 398,853,921.04 = 81,649,154.58 : x
  2. Step 2: Convert to fraction form
    265,863,087.65/398,853,921.04 = 81,649,154.58/x
  3. Step 3: Cross multiply
    265,863,087.65x = 398,853,921.04 × 81,649,154.58
  4. Step 4: Simplify right side
    265,863,087.65x = 32,566,085,455,125,652
  5. Step 5: Solve for x
    x = 32,566,085,455,125,652/265,863,087.65
  6. Step 6: Final answer
    x = 122,491,940.28

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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.