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Finding the Fourth Proportional to 92,939.28, 139,394.28 and 77,245.08

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Solution

The fourth proportional to 92,939.28, 139,394.28 and 77,245.08 is: 115,855.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,939.28 : 139,394.28 = 77,245.08 : x
  2. Step 2: Convert to fraction form
    92,939.28/139,394.28 = 77,245.08/x
  3. Step 3: Cross multiply
    92,939.28x = 139,394.28 × 77,245.08
  4. Step 4: Simplify right side
    92,939.28x = 10,767,522,310.14
  5. Step 5: Solve for x
    x = 10,767,522,310.14/92,939.28
  6. Step 6: Final answer
    x = 115,855.45

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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.