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Finding the Fourth Proportional to 57,965.40, 87,005.70 and 28,416.60

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Solution

The fourth proportional to 57,965.40, 87,005.70 and 28,416.60 is: 42,653.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,965.40 : 87,005.70 = 28,416.60 : x
  2. Step 2: Convert to fraction form
    57,965.40/87,005.70 = 28,416.60/x
  3. Step 3: Cross multiply
    57,965.40x = 87,005.70 × 28,416.60
  4. Step 4: Simplify right side
    57,965.40x = 2,472,406,174.62
  5. Step 5: Solve for x
    x = 2,472,406,174.62/57,965.40
  6. Step 6: Final answer
    x = 42,653.14

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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.