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Finding the Fourth Proportional to 92,154.49, 138,250.19 and 28,990.51

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Solution

The fourth proportional to 92,154.49, 138,250.19 and 28,990.51 is: 43,491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,154.49 : 138,250.19 = 28,990.51 : x
  2. Step 2: Convert to fraction form
    92,154.49/138,250.19 = 28,990.51/x
  3. Step 3: Cross multiply
    92,154.49x = 138,250.19 × 28,990.51
  4. Step 4: Simplify right side
    92,154.49x = 4,007,943,242.55
  5. Step 5: Solve for x
    x = 4,007,943,242.55/92,154.49
  6. Step 6: Final answer
    x = 43,491.57

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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.