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Finding the Fourth Proportional to 127,866.90, 191,800.35 and 81,326.10

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Solution

The fourth proportional to 127,866.90, 191,800.35 and 81,326.10 is: 121,989.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,866.90 : 191,800.35 = 81,326.10 : x
  2. Step 2: Convert to fraction form
    127,866.90/191,800.35 = 81,326.10/x
  3. Step 3: Cross multiply
    127,866.90x = 191,800.35 × 81,326.10
  4. Step 4: Simplify right side
    127,866.90x = 15,598,374,444.14
  5. Step 5: Solve for x
    x = 15,598,374,444.14/127,866.90
  6. Step 6: Final answer
    x = 121,989.15

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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.