Home / 90,540.88-135,818.81-28,211.38

Finding the Fourth Proportional to 90,540.88, 135,818.81 and 28,211.38

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Solution

The fourth proportional to 90,540.88, 135,818.81 and 28,211.38 is: 42,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,540.88 : 135,818.81 = 28,211.38 : x
  2. Step 2: Convert to fraction form
    90,540.88/135,818.81 = 28,211.38/x
  3. Step 3: Cross multiply
    90,540.88x = 135,818.81 × 28,211.38
  4. Step 4: Simplify right side
    90,540.88x = 3,831,636,060.06
  5. Step 5: Solve for x
    x = 3,831,636,060.06/90,540.88
  6. Step 6: Final answer
    x = 42,319.40

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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.