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Finding the Fourth Proportional to 101,368.15, 139,882.39 and 56,043.49

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Solution

The fourth proportional to 101,368.15, 139,882.39 and 56,043.49 is: 77,336.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,368.15 : 139,882.39 = 56,043.49 : x
  2. Step 2: Convert to fraction form
    101,368.15/139,882.39 = 56,043.49/x
  3. Step 3: Cross multiply
    101,368.15x = 139,882.39 × 56,043.49
  4. Step 4: Simplify right side
    101,368.15x = 7,839,497,325.14
  5. Step 5: Solve for x
    x = 7,839,497,325.14/101,368.15
  6. Step 6: Final answer
    x = 77,336.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.