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Finding the Fourth Proportional to 121,292.20, 170,159 and 121,292.20

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Solution

The fourth proportional to 121,292.20, 170,159 and 121,292.20 is: 170,159

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,292.20 : 170,159 = 121,292.20 : x
  2. Step 2: Convert to fraction form
    121,292.20/170,159 = 121,292.20/x
  3. Step 3: Cross multiply
    121,292.20x = 170,159 × 121,292.20
  4. Step 4: Simplify right side
    121,292.20x = 20,638,959,459.80
  5. Step 5: Solve for x
    x = 20,638,959,459.80/121,292.20
  6. Step 6: Final answer
    x = 170,159

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.