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Finding the Fourth Proportional to 78,179.19, 107,887.29 and 42,369.19

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Solution

The fourth proportional to 78,179.19, 107,887.29 and 42,369.19 is: 58,469.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,179.19 : 107,887.29 = 42,369.19 : x
  2. Step 2: Convert to fraction form
    78,179.19/107,887.29 = 42,369.19/x
  3. Step 3: Cross multiply
    78,179.19x = 107,887.29 × 42,369.19
  4. Step 4: Simplify right side
    78,179.19x = 4,571,097,358.31
  5. Step 5: Solve for x
    x = 4,571,097,358.31/78,179.19
  6. Step 6: Final answer
    x = 58,469.49

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1.5x scale

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.