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Finding the Fourth Proportional to 88,626.78, 132,965.91 and 28,653.98

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Solution

The fourth proportional to 88,626.78, 132,965.91 and 28,653.98 is: 42,989.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,626.78 : 132,965.91 = 28,653.98 : x
  2. Step 2: Convert to fraction form
    88,626.78/132,965.91 = 28,653.98/x
  3. Step 3: Cross multiply
    88,626.78x = 132,965.91 × 28,653.98
  4. Step 4: Simplify right side
    88,626.78x = 3,810,001,860.99
  5. Step 5: Solve for x
    x = 3,810,001,860.99/88,626.78
  6. Step 6: Final answer
    x = 42,989.28

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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.