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Finding the Fourth Proportional to 89,925.58, 135,041.46 and 86,163.94

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Solution

The fourth proportional to 89,925.58, 135,041.46 and 86,163.94 is: 129,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,925.58 : 135,041.46 = 86,163.94 : x
  2. Step 2: Convert to fraction form
    89,925.58/135,041.46 = 86,163.94/x
  3. Step 3: Cross multiply
    89,925.58x = 135,041.46 × 86,163.94
  4. Step 4: Simplify right side
    89,925.58x = 11,635,704,256.95
  5. Step 5: Solve for x
    x = 11,635,704,256.95/89,925.58
  6. Step 6: Final answer
    x = 129,392.60

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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.