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Finding the Fourth Proportional to 143,357.89, 197,840.64 and 79,696.75

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Solution

The fourth proportional to 143,357.89, 197,840.64 and 79,696.75 is: 109,985.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,357.89 : 197,840.64 = 79,696.75 : x
  2. Step 2: Convert to fraction form
    143,357.89/197,840.64 = 79,696.75/x
  3. Step 3: Cross multiply
    143,357.89x = 197,840.64 × 79,696.75
  4. Step 4: Simplify right side
    143,357.89x = 15,767,256,025.92
  5. Step 5: Solve for x
    x = 15,767,256,025.92/143,357.89
  6. Step 6: Final answer
    x = 109,985.27

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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.