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Finding the Fourth Proportional to 133,051.60, 199,577.40 and 85,812.40

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Solution

The fourth proportional to 133,051.60, 199,577.40 and 85,812.40 is: 128,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,051.60 : 199,577.40 = 85,812.40 : x
  2. Step 2: Convert to fraction form
    133,051.60/199,577.40 = 85,812.40/x
  3. Step 3: Cross multiply
    133,051.60x = 199,577.40 × 85,812.40
  4. Step 4: Simplify right side
    133,051.60x = 17,126,215,679.76
  5. Step 5: Solve for x
    x = 17,126,215,679.76/133,051.60
  6. Step 6: Final answer
    x = 128,718.60

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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.