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Finding the Fourth Proportional to 85,587.76, 118,143.53 and 76,619.17

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Solution

The fourth proportional to 85,587.76, 118,143.53 and 76,619.17 is: 105,763.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,587.76 : 118,143.53 = 76,619.17 : x
  2. Step 2: Convert to fraction form
    85,587.76/118,143.53 = 76,619.17/x
  3. Step 3: Cross multiply
    85,587.76x = 118,143.53 × 76,619.17
  4. Step 4: Simplify right side
    85,587.76x = 9,052,059,209.47
  5. Step 5: Solve for x
    x = 9,052,059,209.47/85,587.76
  6. Step 6: Final answer
    x = 105,763.48

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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.