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Finding the Fourth Proportional to 92,709.90, 139,032.45 and 48,321.90

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Solution

The fourth proportional to 92,709.90, 139,032.45 and 48,321.90 is: 72,465.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,709.90 : 139,032.45 = 48,321.90 : x
  2. Step 2: Convert to fraction form
    92,709.90/139,032.45 = 48,321.90/x
  3. Step 3: Cross multiply
    92,709.90x = 139,032.45 × 48,321.90
  4. Step 4: Simplify right side
    92,709.90x = 6,718,312,145.66
  5. Step 5: Solve for x
    x = 6,718,312,145.66/92,709.90
  6. Step 6: Final answer
    x = 72,465.96

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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.