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Finding the Fourth Proportional to 101,133.75, 139,564.64 and 56,421.75

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Solution

The fourth proportional to 101,133.75, 139,564.64 and 56,421.75 is: 77,862.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,133.75 : 139,564.64 = 56,421.75 : x
  2. Step 2: Convert to fraction form
    101,133.75/139,564.64 = 56,421.75/x
  3. Step 3: Cross multiply
    101,133.75x = 139,564.64 × 56,421.75
  4. Step 4: Simplify right side
    101,133.75x = 7,874,481,226.92
  5. Step 5: Solve for x
    x = 7,874,481,226.92/101,133.75
  6. Step 6: Final answer
    x = 77,862.05

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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.