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Finding the Fourth Proportional to 70,716.36, 97,581.90 and 42,033.72

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Solution

The fourth proportional to 70,716.36, 97,581.90 and 42,033.72 is: 58,002.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,716.36 : 97,581.90 = 42,033.72 : x
  2. Step 2: Convert to fraction form
    70,716.36/97,581.90 = 42,033.72/x
  3. Step 3: Cross multiply
    70,716.36x = 97,581.90 × 42,033.72
  4. Step 4: Simplify right side
    70,716.36x = 4,101,730,261.67
  5. Step 5: Solve for x
    x = 4,101,730,261.67/70,716.36
  6. Step 6: Final answer
    x = 58,002.56

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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.