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Finding the Fourth Proportional to 77,187.17, 115,780.76 and 21,783.17

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Solution

The fourth proportional to 77,187.17, 115,780.76 and 21,783.17 is: 32,674.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,187.17 : 115,780.76 = 21,783.17 : x
  2. Step 2: Convert to fraction form
    77,187.17/115,780.76 = 21,783.17/x
  3. Step 3: Cross multiply
    77,187.17x = 115,780.76 × 21,783.17
  4. Step 4: Simplify right side
    77,187.17x = 2,522,072,240.03
  5. Step 5: Solve for x
    x = 2,522,072,240.03/77,187.17
  6. Step 6: Final answer
    x = 32,674.76

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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.