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Finding the Fourth Proportional to 115,886.36, 159,943.20 and 65,585.36

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Solution

The fourth proportional to 115,886.36, 159,943.20 and 65,585.36 is: 90,519.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,886.36 : 159,943.20 = 65,585.36 : x
  2. Step 2: Convert to fraction form
    115,886.36/159,943.20 = 65,585.36/x
  3. Step 3: Cross multiply
    115,886.36x = 159,943.20 × 65,585.36
  4. Step 4: Simplify right side
    115,886.36x = 10,489,932,351.55
  5. Step 5: Solve for x
    x = 10,489,932,351.55/115,886.36
  6. Step 6: Final answer
    x = 90,519.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.