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Finding the Fourth Proportional to 143,097.66, 197,464.88 and 79,430.45

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Solution

The fourth proportional to 143,097.66, 197,464.88 and 79,430.45 is: 109,608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,097.66 : 197,464.88 = 79,430.45 : x
  2. Step 2: Convert to fraction form
    143,097.66/197,464.88 = 79,430.45/x
  3. Step 3: Cross multiply
    143,097.66x = 197,464.88 × 79,430.45
  4. Step 4: Simplify right side
    143,097.66x = 15,684,722,893.12
  5. Step 5: Solve for x
    x = 15,684,722,893.12/143,097.66
  6. Step 6: Final answer
    x = 109,608.52

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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.