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Finding the Fourth Proportional to 121,600.70, 167,811.80 and 76,280.58

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Solution

The fourth proportional to 121,600.70, 167,811.80 and 76,280.58 is: 105,268.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,600.70 : 167,811.80 = 76,280.58 : x
  2. Step 2: Convert to fraction form
    121,600.70/167,811.80 = 76,280.58/x
  3. Step 3: Cross multiply
    121,600.70x = 167,811.80 × 76,280.58
  4. Step 4: Simplify right side
    121,600.70x = 12,800,781,053.44
  5. Step 5: Solve for x
    x = 12,800,781,053.44/121,600.70
  6. Step 6: Final answer
    x = 105,268.98

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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.