Home / 138,588.30-191,269.35-78,162.30

Finding the Fourth Proportional to 138,588.30, 191,269.35 and 78,162.30

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Solution

The fourth proportional to 138,588.30, 191,269.35 and 78,162.30 is: 107,873.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,588.30 : 191,269.35 = 78,162.30 : x
  2. Step 2: Convert to fraction form
    138,588.30/191,269.35 = 78,162.30/x
  3. Step 3: Cross multiply
    138,588.30x = 191,269.35 × 78,162.30
  4. Step 4: Simplify right side
    138,588.30x = 14,950,052,315.51
  5. Step 5: Solve for x
    x = 14,950,052,315.51/138,588.30
  6. Step 6: Final answer
    x = 107,873.84

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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.