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Finding the Fourth Proportional to 101,425.33, 139,965.23 and 56,103.28

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Solution

The fourth proportional to 101,425.33, 139,965.23 and 56,103.28 is: 77,421.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,425.33 : 139,965.23 = 56,103.28 : x
  2. Step 2: Convert to fraction form
    101,425.33/139,965.23 = 56,103.28/x
  3. Step 3: Cross multiply
    101,425.33x = 139,965.23 × 56,103.28
  4. Step 4: Simplify right side
    101,425.33x = 7,852,507,963.72
  5. Step 5: Solve for x
    x = 7,852,507,963.72/101,425.33
  6. Step 6: Final answer
    x = 77,421.57

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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.