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Finding the Fourth Proportional to 90,920.94, 136,402.86 and 28,591.44

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Solution

The fourth proportional to 90,920.94, 136,402.86 and 28,591.44 is: 42,893.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,920.94 : 136,402.86 = 28,591.44 : x
  2. Step 2: Convert to fraction form
    90,920.94/136,402.86 = 28,591.44/x
  3. Step 3: Cross multiply
    90,920.94x = 136,402.86 × 28,591.44
  4. Step 4: Simplify right side
    90,920.94x = 3,899,954,187.52
  5. Step 5: Solve for x
    x = 3,899,954,187.52/90,920.94
  6. Step 6: Final answer
    x = 42,893.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.