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Finding the Fourth Proportional to 67,920.90, 93,742.02 and 37,715.88

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Solution

The fourth proportional to 67,920.90, 93,742.02 and 37,715.88 is: 52,054.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,920.90 : 93,742.02 = 37,715.88 : x
  2. Step 2: Convert to fraction form
    67,920.90/93,742.02 = 37,715.88/x
  3. Step 3: Cross multiply
    67,920.90x = 93,742.02 × 37,715.88
  4. Step 4: Simplify right side
    67,920.90x = 3,535,562,777.28
  5. Step 5: Solve for x
    x = 3,535,562,777.28/67,920.90
  6. Step 6: Final answer
    x = 52,054.12

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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.