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Finding the Fourth Proportional to 121,588.30, 167,787.48 and 76,290.67

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Solution

The fourth proportional to 121,588.30, 167,787.48 and 76,290.67 is: 105,278.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,588.30 : 167,787.48 = 76,290.67 : x
  2. Step 2: Convert to fraction form
    121,588.30/167,787.48 = 76,290.67/x
  3. Step 3: Cross multiply
    121,588.30x = 167,787.48 × 76,290.67
  4. Step 4: Simplify right side
    121,588.30x = 12,800,619,266.81
  5. Step 5: Solve for x
    x = 12,800,619,266.81/121,588.30
  6. Step 6: Final answer
    x = 105,278.38

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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.