Home / 89,121.35-133,682.79-71,307.87

Finding the Fourth Proportional to 89,121.35, 133,682.79 and 71,307.87

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Solution

The fourth proportional to 89,121.35, 133,682.79 and 71,307.87 is: 106,962.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,121.35 : 133,682.79 = 71,307.87 : x
  2. Step 2: Convert to fraction form
    89,121.35/133,682.79 = 71,307.87/x
  3. Step 3: Cross multiply
    89,121.35x = 133,682.79 × 71,307.87
  4. Step 4: Simplify right side
    89,121.35x = 9,532,633,985.60
  5. Step 5: Solve for x
    x = 9,532,633,985.60/89,121.35
  6. Step 6: Final answer
    x = 106,962.41

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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.