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Finding the Fourth Proportional to 85,888.80, 128,833.20 and 43,898.40

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Solution

The fourth proportional to 85,888.80, 128,833.20 and 43,898.40 is: 65,847.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,888.80 : 128,833.20 = 43,898.40 : x
  2. Step 2: Convert to fraction form
    85,888.80/128,833.20 = 43,898.40/x
  3. Step 3: Cross multiply
    85,888.80x = 128,833.20 × 43,898.40
  4. Step 4: Simplify right side
    85,888.80x = 5,655,571,346.88
  5. Step 5: Solve for x
    x = 5,655,571,346.88/85,888.80
  6. Step 6: Final answer
    x = 65,847.60

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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.