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Finding the Fourth Proportional to 84,855.40, 127,283.10 and 72,932.20

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Solution

The fourth proportional to 84,855.40, 127,283.10 and 72,932.20 is: 109,398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,855.40 : 127,283.10 = 72,932.20 : x
  2. Step 2: Convert to fraction form
    84,855.40/127,283.10 = 72,932.20/x
  3. Step 3: Cross multiply
    84,855.40x = 127,283.10 × 72,932.20
  4. Step 4: Simplify right side
    84,855.40x = 9,283,036,505.82
  5. Step 5: Solve for x
    x = 9,283,036,505.82/84,855.40
  6. Step 6: Final answer
    x = 109,398.30

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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.