Home / 121,905.81-168,226.20-68,191.74

Finding the Fourth Proportional to 121,905.81, 168,226.20 and 68,191.74

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Solution

The fourth proportional to 121,905.81, 168,226.20 and 68,191.74 is: 94,102.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,905.81 : 168,226.20 = 68,191.74 : x
  2. Step 2: Convert to fraction form
    121,905.81/168,226.20 = 68,191.74/x
  3. Step 3: Cross multiply
    121,905.81x = 168,226.20 × 68,191.74
  4. Step 4: Simplify right side
    121,905.81x = 11,471,637,291.59
  5. Step 5: Solve for x
    x = 11,471,637,291.59/121,905.81
  6. Step 6: Final answer
    x = 94,102.47

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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.