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Finding the Fourth Proportional to 121,411.20, 182,116.80 and 77,233.80

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Solution

The fourth proportional to 121,411.20, 182,116.80 and 77,233.80 is: 115,850.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,411.20 : 182,116.80 = 77,233.80 : x
  2. Step 2: Convert to fraction form
    121,411.20/182,116.80 = 77,233.80/x
  3. Step 3: Cross multiply
    121,411.20x = 182,116.80 × 77,233.80
  4. Step 4: Simplify right side
    121,411.20x = 14,065,572,507.84
  5. Step 5: Solve for x
    x = 14,065,572,507.84/121,411.20
  6. Step 6: Final answer
    x = 115,850.70

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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.