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Finding the Fourth Proportional to 81,866.01, 112,990.57 and 51,253.34

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Solution

The fourth proportional to 81,866.01, 112,990.57 and 51,253.34 is: 70,739.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,866.01 : 112,990.57 = 51,253.34 : x
  2. Step 2: Convert to fraction form
    81,866.01/112,990.57 = 51,253.34/x
  3. Step 3: Cross multiply
    81,866.01x = 112,990.57 × 51,253.34
  4. Step 4: Simplify right side
    81,866.01x = 5,791,144,101.00
  5. Step 5: Solve for x
    x = 5,791,144,101.00/81,866.01
  6. Step 6: Final answer
    x = 70,739.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.