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Finding the Fourth Proportional to 92,776.48, 139,057.14 and 42,751.48

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Solution

The fourth proportional to 92,776.48, 139,057.14 and 42,751.48 is: 64,077.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,776.48 : 139,057.14 = 42,751.48 : x
  2. Step 2: Convert to fraction form
    92,776.48/139,057.14 = 42,751.48/x
  3. Step 3: Cross multiply
    92,776.48x = 139,057.14 × 42,751.48
  4. Step 4: Simplify right side
    92,776.48x = 5,944,898,539.57
  5. Step 5: Solve for x
    x = 5,944,898,539.57/92,776.48
  6. Step 6: Final answer
    x = 64,077.65

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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.