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Finding the Fourth Proportional to 143,358.90, 197,842.02 and 79,697.76

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Solution

The fourth proportional to 143,358.90, 197,842.02 and 79,697.76 is: 109,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,358.90 : 197,842.02 = 79,697.76 : x
  2. Step 2: Convert to fraction form
    143,358.90/197,842.02 = 79,697.76/x
  3. Step 3: Cross multiply
    143,358.90x = 197,842.02 × 79,697.76
  4. Step 4: Simplify right side
    143,358.90x = 15,767,565,827.88
  5. Step 5: Solve for x
    x = 15,767,565,827.88/143,358.90
  6. Step 6: Final answer
    x = 109,986.65

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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.