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Finding the Fourth Proportional to 105,504.31, 145,598.51 and 57,757.51

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Solution

The fourth proportional to 105,504.31, 145,598.51 and 57,757.51 is: 79,706.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,504.31 : 145,598.51 = 57,757.51 : x
  2. Step 2: Convert to fraction form
    105,504.31/145,598.51 = 57,757.51/x
  3. Step 3: Cross multiply
    105,504.31x = 145,598.51 × 57,757.51
  4. Step 4: Simplify right side
    105,504.31x = 8,409,406,380.53
  5. Step 5: Solve for x
    x = 8,409,406,380.53/105,504.31
  6. Step 6: Final answer
    x = 79,706.76

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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.