Home / 121,912.50-168,242.63-68,206.80

Finding the Fourth Proportional to 121,912.50, 168,242.63 and 68,206.80

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Solution

The fourth proportional to 121,912.50, 168,242.63 and 68,206.80 is: 94,127.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,912.50 : 168,242.63 = 68,206.80 : x
  2. Step 2: Convert to fraction form
    121,912.50/168,242.63 = 68,206.80/x
  3. Step 3: Cross multiply
    121,912.50x = 168,242.63 × 68,206.80
  4. Step 4: Simplify right side
    121,912.50x = 11,475,291,074.85
  5. Step 5: Solve for x
    x = 11,475,291,074.85/121,912.50
  6. Step 6: Final answer
    x = 94,127.27

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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.