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Finding the Fourth Proportional to 121,191.40, 167,133.54 and 76,401.64

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Solution

The fourth proportional to 121,191.40, 167,133.54 and 76,401.64 is: 105,364.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,191.40 : 167,133.54 = 76,401.64 : x
  2. Step 2: Convert to fraction form
    121,191.40/167,133.54 = 76,401.64/x
  3. Step 3: Cross multiply
    121,191.40x = 167,133.54 × 76,401.64
  4. Step 4: Simplify right side
    121,191.40x = 12,769,276,555.01
  5. Step 5: Solve for x
    x = 12,769,276,555.01/121,191.40
  6. Step 6: Final answer
    x = 105,364.54

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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.