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Finding the Fourth Proportional to 86,530.74, 129,789.95 and 23,354.46

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Solution

The fourth proportional to 86,530.74, 129,789.95 and 23,354.46 is: 35,030.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,530.74 : 129,789.95 = 23,354.46 : x
  2. Step 2: Convert to fraction form
    86,530.74/129,789.95 = 23,354.46/x
  3. Step 3: Cross multiply
    86,530.74x = 129,789.95 × 23,354.46
  4. Step 4: Simplify right side
    86,530.74x = 3,031,173,952.92
  5. Step 5: Solve for x
    x = 3,031,173,952.92/86,530.74
  6. Step 6: Final answer
    x = 35,030.03

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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.