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Finding the Fourth Proportional to 79,939.61, 119,885.37 and 65,864.75

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Solution

The fourth proportional to 79,939.61, 119,885.37 and 65,864.75 is: 98,777.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,939.61 : 119,885.37 = 65,864.75 : x
  2. Step 2: Convert to fraction form
    79,939.61/119,885.37 = 65,864.75/x
  3. Step 3: Cross multiply
    79,939.61x = 119,885.37 × 65,864.75
  4. Step 4: Simplify right side
    79,939.61x = 7,896,219,077.29
  5. Step 5: Solve for x
    x = 7,896,219,077.29/79,939.61
  6. Step 6: Final answer
    x = 98,777.30

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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.