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Finding the Fourth Proportional to 81,353.66, 122,154.44 and 77,344.16

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Solution

The fourth proportional to 81,353.66, 122,154.44 and 77,344.16 is: 116,134.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,353.66 : 122,154.44 = 77,344.16 : x
  2. Step 2: Convert to fraction form
    81,353.66/122,154.44 = 77,344.16/x
  3. Step 3: Cross multiply
    81,353.66x = 122,154.44 × 77,344.16
  4. Step 4: Simplify right side
    81,353.66x = 9,447,931,554.58
  5. Step 5: Solve for x
    x = 9,447,931,554.58/81,353.66
  6. Step 6: Final answer
    x = 116,134.08

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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.