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Finding the Fourth Proportional to 119,145.33, 178,740 and 39,187.80

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Solution

The fourth proportional to 119,145.33, 178,740 and 39,187.80 is: 58,788.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,145.33 : 178,740 = 39,187.80 : x
  2. Step 2: Convert to fraction form
    119,145.33/178,740 = 39,187.80/x
  3. Step 3: Cross multiply
    119,145.33x = 178,740 × 39,187.80
  4. Step 4: Simplify right side
    119,145.33x = 7,004,427,372.00
  5. Step 5: Solve for x
    x = 7,004,427,372.00/119,145.33
  6. Step 6: Final answer
    x = 58,788.94

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1.5x scale

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.