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Finding the Fourth Proportional to 81,411.66, 112,291.99 and 57,263.84

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Solution

The fourth proportional to 81,411.66, 112,291.99 and 57,263.84 is: 78,984.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,411.66 : 112,291.99 = 57,263.84 : x
  2. Step 2: Convert to fraction form
    81,411.66/112,291.99 = 57,263.84/x
  3. Step 3: Cross multiply
    81,411.66x = 112,291.99 × 57,263.84
  4. Step 4: Simplify right side
    81,411.66x = 6,430,270,548.64
  5. Step 5: Solve for x
    x = 6,430,270,548.64/81,411.66
  6. Step 6: Final answer
    x = 78,984.64

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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.