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Finding the Fourth Proportional to 86,644.28, 129,966.18 and 70,897.88

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Solution

The fourth proportional to 86,644.28, 129,966.18 and 70,897.88 is: 106,346.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,644.28 : 129,966.18 = 70,897.88 : x
  2. Step 2: Convert to fraction form
    86,644.28/129,966.18 = 70,897.88/x
  3. Step 3: Cross multiply
    86,644.28x = 129,966.18 × 70,897.88
  4. Step 4: Simplify right side
    86,644.28x = 9,214,326,633.70
  5. Step 5: Solve for x
    x = 9,214,326,633.70/86,644.28
  6. Step 6: Final answer
    x = 106,346.62

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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.