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Finding the Fourth Proportional to 127,379.97, 175,780.55 and 72,930.33

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Solution

The fourth proportional to 127,379.97, 175,780.55 and 72,930.33 is: 100,641.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,379.97 : 175,780.55 = 72,930.33 : x
  2. Step 2: Convert to fraction form
    127,379.97/175,780.55 = 72,930.33/x
  3. Step 3: Cross multiply
    127,379.97x = 175,780.55 × 72,930.33
  4. Step 4: Simplify right side
    127,379.97x = 12,819,733,154.43
  5. Step 5: Solve for x
    x = 12,819,733,154.43/127,379.97
  6. Step 6: Final answer
    x = 100,641.67

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1.5x scale

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.