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Finding the Fourth Proportional to 89,987.76, 134,942.76 and 27,643.68

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Solution

The fourth proportional to 89,987.76, 134,942.76 and 27,643.68 is: 41,453.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,987.76 : 134,942.76 = 27,643.68 : x
  2. Step 2: Convert to fraction form
    89,987.76/134,942.76 = 27,643.68/x
  3. Step 3: Cross multiply
    89,987.76x = 134,942.76 × 27,643.68
  4. Step 4: Simplify right side
    89,987.76x = 3,730,314,475.76
  5. Step 5: Solve for x
    x = 3,730,314,475.76/89,987.76
  6. Step 6: Final answer
    x = 41,453.58

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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.