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Finding the Fourth Proportional to 86,595.30, 129,892.95 and 81,783.90

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Solution

The fourth proportional to 86,595.30, 129,892.95 and 81,783.90 is: 122,675.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,595.30 : 129,892.95 = 81,783.90 : x
  2. Step 2: Convert to fraction form
    86,595.30/129,892.95 = 81,783.90/x
  3. Step 3: Cross multiply
    86,595.30x = 129,892.95 × 81,783.90
  4. Step 4: Simplify right side
    86,595.30x = 10,623,152,033.51
  5. Step 5: Solve for x
    x = 10,623,152,033.51/86,595.30
  6. Step 6: Final answer
    x = 122,675.85

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Similar ratio
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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.