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Finding the Fourth Proportional to 101,869.72, 152,964.45 and 86,279.11

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Solution

The fourth proportional to 101,869.72, 152,964.45 and 86,279.11 is: 129,554.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,869.72 : 152,964.45 = 86,279.11 : x
  2. Step 2: Convert to fraction form
    101,869.72/152,964.45 = 86,279.11/x
  3. Step 3: Cross multiply
    101,869.72x = 152,964.45 × 86,279.11
  4. Step 4: Simplify right side
    101,869.72x = 13,197,636,225.23
  5. Step 5: Solve for x
    x = 13,197,636,225.23/101,869.72
  6. Step 6: Final answer
    x = 129,554.07

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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.