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Finding the Fourth Proportional to 265,721,856.80, 398,645,770.80 and 136,349,434.40

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Solution

The fourth proportional to 265,721,856.80, 398,645,770.80 and 136,349,434.40 is: 204,556,471.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,721,856.80 : 398,645,770.80 = 136,349,434.40 : x
  2. Step 2: Convert to fraction form
    265,721,856.80/398,645,770.80 = 136,349,434.40/x
  3. Step 3: Cross multiply
    265,721,856.80x = 398,645,770.80 × 136,349,434.40
  4. Step 4: Simplify right side
    265,721,856.80x = 54,355,125,374,532,040
  5. Step 5: Solve for x
    x = 54,355,125,374,532,040/265,721,856.80
  6. Step 6: Final answer
    x = 204,556,471.30

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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.