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Finding the Fourth Proportional to 142,736.88, 196,969.14 and 79,070.88

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Solution

The fourth proportional to 142,736.88, 196,969.14 and 79,070.88 is: 109,113.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,736.88 : 196,969.14 = 79,070.88 : x
  2. Step 2: Convert to fraction form
    142,736.88/196,969.14 = 79,070.88/x
  3. Step 3: Cross multiply
    142,736.88x = 196,969.14 × 79,070.88
  4. Step 4: Simplify right side
    142,736.88x = 15,574,523,232.64
  5. Step 5: Solve for x
    x = 15,574,523,232.64/142,736.88
  6. Step 6: Final answer
    x = 109,113.52

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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.