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Finding the Fourth Proportional to 101,391.12, 139,914.16 and 56,066.48

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Solution

The fourth proportional to 101,391.12, 139,914.16 and 56,066.48 is: 77,368.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,391.12 : 139,914.16 = 56,066.48 : x
  2. Step 2: Convert to fraction form
    101,391.12/139,914.16 = 56,066.48/x
  3. Step 3: Cross multiply
    101,391.12x = 139,914.16 × 56,066.48
  4. Step 4: Simplify right side
    101,391.12x = 7,844,494,453.36
  5. Step 5: Solve for x
    x = 7,844,494,453.36/101,391.12
  6. Step 6: Final answer
    x = 77,368.65

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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.