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Finding the Fourth Proportional to 55,643.40, 83,465.10 and 47,003.40

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Solution

The fourth proportional to 55,643.40, 83,465.10 and 47,003.40 is: 70,505.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,643.40 : 83,465.10 = 47,003.40 : x
  2. Step 2: Convert to fraction form
    55,643.40/83,465.10 = 47,003.40/x
  3. Step 3: Cross multiply
    55,643.40x = 83,465.10 × 47,003.40
  4. Step 4: Simplify right side
    55,643.40x = 3,923,143,481.34
  5. Step 5: Solve for x
    x = 3,923,143,481.34/55,643.40
  6. Step 6: Final answer
    x = 70,505.10

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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.