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Finding the Fourth Proportional to 135,907.88, 187,491.31 and 87,492.42

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Solution

The fourth proportional to 135,907.88, 187,491.31 and 87,492.42 is: 120,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,907.88 : 187,491.31 = 87,492.42 : x
  2. Step 2: Convert to fraction form
    135,907.88/187,491.31 = 87,492.42/x
  3. Step 3: Cross multiply
    135,907.88x = 187,491.31 × 87,492.42
  4. Step 4: Simplify right side
    135,907.88x = 16,404,068,222.14
  5. Step 5: Solve for x
    x = 16,404,068,222.14/135,907.88
  6. Step 6: Final answer
    x = 120,699.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.