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Finding the Fourth Proportional to 105,513.84, 145,608.03 and 57,766.77

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Solution

The fourth proportional to 105,513.84, 145,608.03 and 57,766.77 is: 79,717.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,513.84 : 145,608.03 = 57,766.77 : x
  2. Step 2: Convert to fraction form
    105,513.84/145,608.03 = 57,766.77/x
  3. Step 3: Cross multiply
    105,513.84x = 145,608.03 × 57,766.77
  4. Step 4: Simplify right side
    105,513.84x = 8,411,305,579.16
  5. Step 5: Solve for x
    x = 8,411,305,579.16/105,513.84
  6. Step 6: Final answer
    x = 79,717.56

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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.