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Finding the Fourth Proportional to 92,421.70, 138,632.55 and 73,394.80

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Solution

The fourth proportional to 92,421.70, 138,632.55 and 73,394.80 is: 110,092.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,421.70 : 138,632.55 = 73,394.80 : x
  2. Step 2: Convert to fraction form
    92,421.70/138,632.55 = 73,394.80/x
  3. Step 3: Cross multiply
    92,421.70x = 138,632.55 × 73,394.80
  4. Step 4: Simplify right side
    92,421.70x = 10,174,908,280.74
  5. Step 5: Solve for x
    x = 10,174,908,280.74/92,421.70
  6. Step 6: Final answer
    x = 110,092.20

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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.