Home / 90,516.60-135,720.36-40,587.66

Finding the Fourth Proportional to 90,516.60, 135,720.36 and 40,587.66

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Solution

The fourth proportional to 90,516.60, 135,720.36 and 40,587.66 is: 60,857.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,516.60 : 135,720.36 = 40,587.66 : x
  2. Step 2: Convert to fraction form
    90,516.60/135,720.36 = 40,587.66/x
  3. Step 3: Cross multiply
    90,516.60x = 135,720.36 × 40,587.66
  4. Step 4: Simplify right side
    90,516.60x = 5,508,571,826.76
  5. Step 5: Solve for x
    x = 5,508,571,826.76/90,516.60
  6. Step 6: Final answer
    x = 60,857.03

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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.