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Finding the Fourth Proportional to 84,668.90, 127,009.62 and 28,508.76

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Solution

The fourth proportional to 84,668.90, 127,009.62 and 28,508.76 is: 42,765.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,668.90 : 127,009.62 = 28,508.76 : x
  2. Step 2: Convert to fraction form
    84,668.90/127,009.62 = 28,508.76/x
  3. Step 3: Cross multiply
    84,668.90x = 127,009.62 × 28,508.76
  4. Step 4: Simplify right side
    84,668.90x = 3,620,886,774.27
  5. Step 5: Solve for x
    x = 3,620,886,774.27/84,668.90
  6. Step 6: Final answer
    x = 42,765.25

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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.