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Finding the Fourth Proportional to 121,473.40, 167,711.34 and 76,213.48

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Solution

The fourth proportional to 121,473.40, 167,711.34 and 76,213.48 is: 105,223.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,473.40 : 167,711.34 = 76,213.48 : x
  2. Step 2: Convert to fraction form
    121,473.40/167,711.34 = 76,213.48/x
  3. Step 3: Cross multiply
    121,473.40x = 167,711.34 × 76,213.48
  4. Step 4: Simplify right side
    121,473.40x = 12,781,864,856.86
  5. Step 5: Solve for x
    x = 12,781,864,856.86/121,473.40
  6. Step 6: Final answer
    x = 105,223.57

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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.