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Finding the Fourth Proportional to 101,368.62, 139,884.57 and 56,043.72

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Solution

The fourth proportional to 101,368.62, 139,884.57 and 56,043.72 is: 77,338.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,368.62 : 139,884.57 = 56,043.72 : x
  2. Step 2: Convert to fraction form
    101,368.62/139,884.57 = 56,043.72/x
  3. Step 3: Cross multiply
    101,368.62x = 139,884.57 × 56,043.72
  4. Step 4: Simplify right side
    101,368.62x = 7,839,651,673.40
  5. Step 5: Solve for x
    x = 7,839,651,673.40/101,368.62
  6. Step 6: Final answer
    x = 77,338.05

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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.