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Finding the Fourth Proportional to 115,859.08, 159,888.90 and 65,557

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Solution

The fourth proportional to 115,859.08, 159,888.90 and 65,557 is: 90,470.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,859.08 : 159,888.90 = 65,557 : x
  2. Step 2: Convert to fraction form
    115,859.08/159,888.90 = 65,557/x
  3. Step 3: Cross multiply
    115,859.08x = 159,888.90 × 65,557
  4. Step 4: Simplify right side
    115,859.08x = 10,481,836,617.30
  5. Step 5: Solve for x
    x = 10,481,836,617.30/115,859.08
  6. Step 6: Final answer
    x = 90,470.57

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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.