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Finding the Fourth Proportional to 142,406.25, 213,469.65 and 79,256.63

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Solution

The fourth proportional to 142,406.25, 213,469.65 and 79,256.63 is: 118,807.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,406.25 : 213,469.65 = 79,256.63 : x
  2. Step 2: Convert to fraction form
    142,406.25/213,469.65 = 79,256.63/x
  3. Step 3: Cross multiply
    142,406.25x = 213,469.65 × 79,256.63
  4. Step 4: Simplify right side
    142,406.25x = 16,918,883,998.93
  5. Step 5: Solve for x
    x = 16,918,883,998.93/142,406.25
  6. Step 6: Final answer
    x = 118,807.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.