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Finding the Fourth Proportional to 84,966.30, 127,449.45 and 72,281.70

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Solution

The fourth proportional to 84,966.30, 127,449.45 and 72,281.70 is: 108,422.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,966.30 : 127,449.45 = 72,281.70 : x
  2. Step 2: Convert to fraction form
    84,966.30/127,449.45 = 72,281.70/x
  3. Step 3: Cross multiply
    84,966.30x = 127,449.45 × 72,281.70
  4. Step 4: Simplify right side
    84,966.30x = 9,212,262,910.07
  5. Step 5: Solve for x
    x = 9,212,262,910.07/84,966.30
  6. Step 6: Final answer
    x = 108,422.55

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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.