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Finding the Fourth Proportional to 88,991.31, 133,487 and 26,661.81

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Solution

The fourth proportional to 88,991.31, 133,487 and 26,661.81 is: 39,992.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,991.31 : 133,487 = 26,661.81 : x
  2. Step 2: Convert to fraction form
    88,991.31/133,487 = 26,661.81/x
  3. Step 3: Cross multiply
    88,991.31x = 133,487 × 26,661.81
  4. Step 4: Simplify right side
    88,991.31x = 3,559,005,031.47
  5. Step 5: Solve for x
    x = 3,559,005,031.47/88,991.31
  6. Step 6: Final answer
    x = 39,992.73

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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.