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Finding the Fourth Proportional to 121,649.50, 167,950.43 and 83,471.77

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Solution

The fourth proportional to 121,649.50, 167,950.43 and 83,471.77 is: 115,241.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,649.50 : 167,950.43 = 83,471.77 : x
  2. Step 2: Convert to fraction form
    121,649.50/167,950.43 = 83,471.77/x
  3. Step 3: Cross multiply
    121,649.50x = 167,950.43 × 83,471.77
  4. Step 4: Simplify right side
    121,649.50x = 14,019,119,247.00
  5. Step 5: Solve for x
    x = 14,019,119,247.00/121,649.50
  6. Step 6: Final answer
    x = 115,241.90

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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.