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Finding the Fourth Proportional to 99,388.05, 137,153.05 and 56,943.84

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Solution

The fourth proportional to 99,388.05, 137,153.05 and 56,943.84 is: 78,581.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,388.05 : 137,153.05 = 56,943.84 : x
  2. Step 2: Convert to fraction form
    99,388.05/137,153.05 = 56,943.84/x
  3. Step 3: Cross multiply
    99,388.05x = 137,153.05 × 56,943.84
  4. Step 4: Simplify right side
    99,388.05x = 7,810,021,706.68
  5. Step 5: Solve for x
    x = 7,810,021,706.68/99,388.05
  6. Step 6: Final answer
    x = 78,581.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.