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Finding the Fourth Proportional to 86,818.77, 119,742.30 and 58,129.31

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Solution

The fourth proportional to 86,818.77, 119,742.30 and 58,129.31 is: 80,173.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,818.77 : 119,742.30 = 58,129.31 : x
  2. Step 2: Convert to fraction form
    86,818.77/119,742.30 = 58,129.31/x
  3. Step 3: Cross multiply
    86,818.77x = 119,742.30 × 58,129.31
  4. Step 4: Simplify right side
    86,818.77x = 6,960,537,576.17
  5. Step 5: Solve for x
    x = 6,960,537,576.17/86,818.77
  6. Step 6: Final answer
    x = 80,173.19

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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.