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Finding the Fourth Proportional to 84,809.76, 127,229.30 and 28,650.28

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Solution

The fourth proportional to 84,809.76, 127,229.30 and 28,650.28 is: 42,980.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,809.76 : 127,229.30 = 28,650.28 : x
  2. Step 2: Convert to fraction form
    84,809.76/127,229.30 = 28,650.28/x
  3. Step 3: Cross multiply
    84,809.76x = 127,229.30 × 28,650.28
  4. Step 4: Simplify right side
    84,809.76x = 3,645,155,069.20
  5. Step 5: Solve for x
    x = 3,645,155,069.20/84,809.76
  6. Step 6: Final answer
    x = 42,980.37

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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.