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Finding the Fourth Proportional to 84,930.72, 127,398.76 and 21,751.24

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Solution

The fourth proportional to 84,930.72, 127,398.76 and 21,751.24 is: 32,627.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,930.72 : 127,398.76 = 21,751.24 : x
  2. Step 2: Convert to fraction form
    84,930.72/127,398.76 = 21,751.24/x
  3. Step 3: Cross multiply
    84,930.72x = 127,398.76 × 21,751.24
  4. Step 4: Simplify right side
    84,930.72x = 2,771,081,004.46
  5. Step 5: Solve for x
    x = 2,771,081,004.46/84,930.72
  6. Step 6: Final answer
    x = 32,627.55

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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.