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Finding the Fourth Proportional to 125,485.61, 188,112.90 and 54,363.56

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Solution

The fourth proportional to 125,485.61, 188,112.90 and 54,363.56 is: 81,495.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,485.61 : 188,112.90 = 54,363.56 : x
  2. Step 2: Convert to fraction form
    125,485.61/188,112.90 = 54,363.56/x
  3. Step 3: Cross multiply
    125,485.61x = 188,112.90 × 54,363.56
  4. Step 4: Simplify right side
    125,485.61x = 10,226,486,925.92
  5. Step 5: Solve for x
    x = 10,226,486,925.92/125,485.61
  6. Step 6: Final answer
    x = 81,495.30

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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.