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Finding the Fourth Proportional to 265,921.40, 398,906.40 and 108,117.20

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Solution

The fourth proportional to 265,921.40, 398,906.40 and 108,117.20 is: 162,185.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,921.40 : 398,906.40 = 108,117.20 : x
  2. Step 2: Convert to fraction form
    265,921.40/398,906.40 = 108,117.20/x
  3. Step 3: Cross multiply
    265,921.40x = 398,906.40 × 108,117.20
  4. Step 4: Simplify right side
    265,921.40x = 43,128,643,030.08
  5. Step 5: Solve for x
    x = 43,128,643,030.08/265,921.40
  6. Step 6: Final answer
    x = 162,185.68

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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.