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Finding the Fourth Proportional to 101,428.11, 139,960.01 and 56,098.89

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Solution

The fourth proportional to 101,428.11, 139,960.01 and 56,098.89 is: 77,410.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,428.11 : 139,960.01 = 56,098.89 : x
  2. Step 2: Convert to fraction form
    101,428.11/139,960.01 = 56,098.89/x
  3. Step 3: Cross multiply
    101,428.11x = 139,960.01 × 56,098.89
  4. Step 4: Simplify right side
    101,428.11x = 7,851,601,205.39
  5. Step 5: Solve for x
    x = 7,851,601,205.39/101,428.11
  6. Step 6: Final answer
    x = 77,410.50

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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.