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Finding the Fourth Proportional to 115,489.63, 159,394.94 and 112,454.12

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Solution

The fourth proportional to 115,489.63, 159,394.94 and 112,454.12 is: 155,205.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,489.63 : 159,394.94 = 112,454.12 : x
  2. Step 2: Convert to fraction form
    115,489.63/159,394.94 = 112,454.12/x
  3. Step 3: Cross multiply
    115,489.63x = 159,394.94 × 112,454.12
  4. Step 4: Simplify right side
    115,489.63x = 17,924,617,968.07
  5. Step 5: Solve for x
    x = 17,924,617,968.07/115,489.63
  6. Step 6: Final answer
    x = 155,205.43

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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.