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Finding the Fourth Proportional to 86,773.91, 129,800.97 and 81,459.50

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Solution

The fourth proportional to 86,773.91, 129,800.97 and 81,459.50 is: 121,851.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,773.91 : 129,800.97 = 81,459.50 : x
  2. Step 2: Convert to fraction form
    86,773.91/129,800.97 = 81,459.50/x
  3. Step 3: Cross multiply
    86,773.91x = 129,800.97 × 81,459.50
  4. Step 4: Simplify right side
    86,773.91x = 10,573,521,466.71
  5. Step 5: Solve for x
    x = 10,573,521,466.71/86,773.91
  6. Step 6: Final answer
    x = 121,851.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.