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Finding the Fourth Proportional to 92,792, 139,211.12 and 27,128

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Solution

The fourth proportional to 92,792, 139,211.12 and 27,128 is: 40,698.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,792 : 139,211.12 = 27,128 : x
  2. Step 2: Convert to fraction form
    92,792/139,211.12 = 27,128/x
  3. Step 3: Cross multiply
    92,792x = 139,211.12 × 27,128
  4. Step 4: Simplify right side
    92,792x = 3,776,519,263.36
  5. Step 5: Solve for x
    x = 3,776,519,263.36/92,792
  6. Step 6: Final answer
    x = 40,698.76

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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.