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Finding the Fourth Proportional to 84,648.60, 127,005.30 and 83,320.20

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Solution

The fourth proportional to 84,648.60, 127,005.30 and 83,320.20 is: 125,012.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,648.60 : 127,005.30 = 83,320.20 : x
  2. Step 2: Convert to fraction form
    84,648.60/127,005.30 = 83,320.20/x
  3. Step 3: Cross multiply
    84,648.60x = 127,005.30 × 83,320.20
  4. Step 4: Simplify right side
    84,648.60x = 10,582,106,997.06
  5. Step 5: Solve for x
    x = 10,582,106,997.06/84,648.60
  6. Step 6: Final answer
    x = 125,012.19

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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.