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Finding the Fourth Proportional to 92,776.70, 139,145.91 and 45,343.10

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Solution

The fourth proportional to 92,776.70, 139,145.91 and 45,343.10 is: 68,005.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,776.70 : 139,145.91 = 45,343.10 : x
  2. Step 2: Convert to fraction form
    92,776.70/139,145.91 = 45,343.10/x
  3. Step 3: Cross multiply
    92,776.70x = 139,145.91 × 45,343.10
  4. Step 4: Simplify right side
    92,776.70x = 6,309,306,911.72
  5. Step 5: Solve for x
    x = 6,309,306,911.72/92,776.70
  6. Step 6: Final answer
    x = 68,005.30

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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.