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Finding the Fourth Proportional to 81,964.80, 122,947.20 and 46,972.80

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Solution

The fourth proportional to 81,964.80, 122,947.20 and 46,972.80 is: 70,459.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,964.80 : 122,947.20 = 46,972.80 : x
  2. Step 2: Convert to fraction form
    81,964.80/122,947.20 = 46,972.80/x
  3. Step 3: Cross multiply
    81,964.80x = 122,947.20 × 46,972.80
  4. Step 4: Simplify right side
    81,964.80x = 5,775,174,236.16
  5. Step 5: Solve for x
    x = 5,775,174,236.16/81,964.80
  6. Step 6: Final answer
    x = 70,459.20

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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.