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Finding the Fourth Proportional to 92,790, 139,208.12 and 27,126

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Solution

The fourth proportional to 92,790, 139,208.12 and 27,126 is: 40,695.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,790 : 139,208.12 = 27,126 : x
  2. Step 2: Convert to fraction form
    92,790/139,208.12 = 27,126/x
  3. Step 3: Cross multiply
    92,790x = 139,208.12 × 27,126
  4. Step 4: Simplify right side
    92,790x = 3,776,159,463.12
  5. Step 5: Solve for x
    x = 3,776,159,463.12/92,790
  6. Step 6: Final answer
    x = 40,695.76

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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.