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Finding the Fourth Proportional to 215,079.54, 296,826.39 and 129,041.76

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Solution

The fourth proportional to 215,079.54, 296,826.39 and 129,041.76 is: 178,087.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,079.54 : 296,826.39 = 129,041.76 : x
  2. Step 2: Convert to fraction form
    215,079.54/296,826.39 = 129,041.76/x
  3. Step 3: Cross multiply
    215,079.54x = 296,826.39 × 129,041.76
  4. Step 4: Simplify right side
    215,079.54x = 38,302,999,780.05
  5. Step 5: Solve for x
    x = 38,302,999,780.05/215,079.54
  6. Step 6: Final answer
    x = 178,087.60

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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.