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Finding the Fourth Proportional to 101,365.31, 139,881.66 and 56,042.12

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Solution

The fourth proportional to 101,365.31, 139,881.66 and 56,042.12 is: 77,336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,365.31 : 139,881.66 = 56,042.12 : x
  2. Step 2: Convert to fraction form
    101,365.31/139,881.66 = 56,042.12/x
  3. Step 3: Cross multiply
    101,365.31x = 139,881.66 × 56,042.12
  4. Step 4: Simplify right side
    101,365.31x = 7,839,265,072.68
  5. Step 5: Solve for x
    x = 7,839,265,072.68/101,365.31
  6. Step 6: Final answer
    x = 77,336.77

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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.