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Finding the Fourth Proportional to 101,380.21, 139,899.02 and 56,055.47

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Solution

The fourth proportional to 101,380.21, 139,899.02 and 56,055.47 is: 77,353.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,380.21 : 139,899.02 = 56,055.47 : x
  2. Step 2: Convert to fraction form
    101,380.21/139,899.02 = 56,055.47/x
  3. Step 3: Cross multiply
    101,380.21x = 139,899.02 × 56,055.47
  4. Step 4: Simplify right side
    101,380.21x = 7,842,104,338.87
  5. Step 5: Solve for x
    x = 7,842,104,338.87/101,380.21
  6. Step 6: Final answer
    x = 77,353.41

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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.