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Finding the Fourth Proportional to 101,358.12, 139,874.42 and 56,646.12

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Solution

The fourth proportional to 101,358.12, 139,874.42 and 56,646.12 is: 78,171.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,358.12 : 139,874.42 = 56,646.12 : x
  2. Step 2: Convert to fraction form
    101,358.12/139,874.42 = 56,646.12/x
  3. Step 3: Cross multiply
    101,358.12x = 139,874.42 × 56,646.12
  4. Step 4: Simplify right side
    101,358.12x = 7,923,343,180.25
  5. Step 5: Solve for x
    x = 7,923,343,180.25/101,358.12
  6. Step 6: Final answer
    x = 78,171.77

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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.