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Finding the Fourth Proportional to 101,928.70, 152,893.05 and 86,182.30

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Solution

The fourth proportional to 101,928.70, 152,893.05 and 86,182.30 is: 129,273.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,928.70 : 152,893.05 = 86,182.30 : x
  2. Step 2: Convert to fraction form
    101,928.70/152,893.05 = 86,182.30/x
  3. Step 3: Cross multiply
    101,928.70x = 152,893.05 × 86,182.30
  4. Step 4: Simplify right side
    101,928.70x = 13,176,674,703.02
  5. Step 5: Solve for x
    x = 13,176,674,703.02/101,928.70
  6. Step 6: Final answer
    x = 129,273.45

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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.