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Finding the Fourth Proportional to 156,415.86, 215,854.98 and 84,797

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Solution

The fourth proportional to 156,415.86, 215,854.98 and 84,797 is: 117,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,415.86 : 215,854.98 = 84,797 : x
  2. Step 2: Convert to fraction form
    156,415.86/215,854.98 = 84,797/x
  3. Step 3: Cross multiply
    156,415.86x = 215,854.98 × 84,797
  4. Step 4: Simplify right side
    156,415.86x = 18,303,854,739.06
  5. Step 5: Solve for x
    x = 18,303,854,739.06/156,415.86
  6. Step 6: Final answer
    x = 117,020.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.