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Finding the Fourth Proportional to 125,323.45, 172,947.05 and 74,361.80

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Solution

The fourth proportional to 125,323.45, 172,947.05 and 74,361.80 is: 102,619.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,323.45 : 172,947.05 = 74,361.80 : x
  2. Step 2: Convert to fraction form
    125,323.45/172,947.05 = 74,361.80/x
  3. Step 3: Cross multiply
    125,323.45x = 172,947.05 × 74,361.80
  4. Step 4: Simplify right side
    125,323.45x = 12,860,653,309.28
  5. Step 5: Solve for x
    x = 12,860,653,309.28/125,323.45
  6. Step 6: Final answer
    x = 102,619.69

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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.