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Finding the Fourth Proportional to 125,620.90, 188,325.42 and 54,490

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Solution

The fourth proportional to 125,620.90, 188,325.42 and 54,490 is: 81,689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,620.90 : 188,325.42 = 54,490 : x
  2. Step 2: Convert to fraction form
    125,620.90/188,325.42 = 54,490/x
  3. Step 3: Cross multiply
    125,620.90x = 188,325.42 × 54,490
  4. Step 4: Simplify right side
    125,620.90x = 10,261,852,135.80
  5. Step 5: Solve for x
    x = 10,261,852,135.80/125,620.90
  6. Step 6: Final answer
    x = 81,689.05

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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.