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Finding the Fourth Proportional to 121,400.20, 167,529 and 70,409.71

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Solution

The fourth proportional to 121,400.20, 167,529 and 70,409.71 is: 97,163.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,400.20 : 167,529 = 70,409.71 : x
  2. Step 2: Convert to fraction form
    121,400.20/167,529 = 70,409.71/x
  3. Step 3: Cross multiply
    121,400.20x = 167,529 × 70,409.71
  4. Step 4: Simplify right side
    121,400.20x = 11,795,668,306.59
  5. Step 5: Solve for x
    x = 11,795,668,306.59/121,400.20
  6. Step 6: Final answer
    x = 97,163.50

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1.5x scale

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.