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Finding the Fourth Proportional to 143,356.58, 197,839.12 and 79,693

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Solution

The fourth proportional to 143,356.58, 197,839.12 and 79,693 is: 109,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,356.58 : 197,839.12 = 79,693 : x
  2. Step 2: Convert to fraction form
    143,356.58/197,839.12 = 79,693/x
  3. Step 3: Cross multiply
    143,356.58x = 197,839.12 × 79,693
  4. Step 4: Simplify right side
    143,356.58x = 15,766,392,990.16
  5. Step 5: Solve for x
    x = 15,766,392,990.16/143,356.58
  6. Step 6: Final answer
    x = 109,980.25

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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.