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Finding the Fourth Proportional to 77,903.70, 107,507.28 and 43,912.32

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Solution

The fourth proportional to 77,903.70, 107,507.28 and 43,912.32 is: 60,599.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,903.70 : 107,507.28 = 43,912.32 : x
  2. Step 2: Convert to fraction form
    77,903.70/107,507.28 = 43,912.32/x
  3. Step 3: Cross multiply
    77,903.70x = 107,507.28 × 43,912.32
  4. Step 4: Simplify right side
    77,903.70x = 4,720,894,081.69
  5. Step 5: Solve for x
    x = 4,720,894,081.69/77,903.70
  6. Step 6: Final answer
    x = 60,599.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.