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Finding the Fourth Proportional to 121,275.70, 170,135.90 and 121,275.70

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Solution

The fourth proportional to 121,275.70, 170,135.90 and 121,275.70 is: 170,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,275.70 : 170,135.90 = 121,275.70 : x
  2. Step 2: Convert to fraction form
    121,275.70/170,135.90 = 121,275.70/x
  3. Step 3: Cross multiply
    121,275.70x = 170,135.90 × 121,275.70
  4. Step 4: Simplify right side
    121,275.70x = 20,633,350,367.63
  5. Step 5: Solve for x
    x = 20,633,350,367.63/121,275.70
  6. Step 6: Final answer
    x = 170,135.90

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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.