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Finding the Fourth Proportional to 143,011.98, 197,347.92 and 79,345.98

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Solution

The fourth proportional to 143,011.98, 197,347.92 and 79,345.98 is: 109,492.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,011.98 : 197,347.92 = 79,345.98 : x
  2. Step 2: Convert to fraction form
    143,011.98/197,347.92 = 79,345.98/x
  3. Step 3: Cross multiply
    143,011.98x = 197,347.92 × 79,345.98
  4. Step 4: Simplify right side
    143,011.98x = 15,658,764,113.36
  5. Step 5: Solve for x
    x = 15,658,764,113.36/143,011.98
  6. Step 6: Final answer
    x = 109,492.67

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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.