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Finding the Fourth Proportional to 265,718,508.80, 398,640,748.80 and 136,346,086.40

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Solution

The fourth proportional to 265,718,508.80, 398,640,748.80 and 136,346,086.40 is: 204,551,448.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,718,508.80 : 398,640,748.80 = 136,346,086.40 : x
  2. Step 2: Convert to fraction form
    265,718,508.80/398,640,748.80 = 136,346,086.40/x
  3. Step 3: Cross multiply
    265,718,508.80x = 398,640,748.80 × 136,346,086.40
  4. Step 4: Simplify right side
    265,718,508.80x = 54,353,105,978,445,504
  5. Step 5: Solve for x
    x = 54,353,105,978,445,504/265,718,508.80
  6. Step 6: Final answer
    x = 204,551,448.91

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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.