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Finding the Fourth Proportional to 93,140.76, 139,711.19 and 30,811.26

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Solution

The fourth proportional to 93,140.76, 139,711.19 and 30,811.26 is: 46,216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,140.76 : 139,711.19 = 30,811.26 : x
  2. Step 2: Convert to fraction form
    93,140.76/139,711.19 = 30,811.26/x
  3. Step 3: Cross multiply
    93,140.76x = 139,711.19 × 30,811.26
  4. Step 4: Simplify right side
    93,140.76x = 4,304,677,645.94
  5. Step 5: Solve for x
    x = 4,304,677,645.94/93,140.76
  6. Step 6: Final answer
    x = 46,216.90

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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.