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Finding the Fourth Proportional to 61,155.31, 91,726.81 and 16,786.53

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Solution

The fourth proportional to 61,155.31, 91,726.81 and 16,786.53 is: 25,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,155.31 : 91,726.81 = 16,786.53 : x
  2. Step 2: Convert to fraction form
    61,155.31/91,726.81 = 16,786.53/x
  3. Step 3: Cross multiply
    61,155.31x = 91,726.81 × 16,786.53
  4. Step 4: Simplify right side
    61,155.31x = 1,539,774,763.94
  5. Step 5: Solve for x
    x = 1,539,774,763.94/61,155.31
  6. Step 6: Final answer
    x = 25,178.10

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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.