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Finding the Fourth Proportional to 115,790, 159,790.20 and 62,798

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Solution

The fourth proportional to 115,790, 159,790.20 and 62,798 is: 86,661.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,790 : 159,790.20 = 62,798 : x
  2. Step 2: Convert to fraction form
    115,790/159,790.20 = 62,798/x
  3. Step 3: Cross multiply
    115,790x = 159,790.20 × 62,798
  4. Step 4: Simplify right side
    115,790x = 10,034,504,979.60
  5. Step 5: Solve for x
    x = 10,034,504,979.60/115,790
  6. Step 6: Final answer
    x = 86,661.24

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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.