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Finding the Fourth Proportional to 143,395.96, 197,885.18 and 79,733.20

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Solution

The fourth proportional to 143,395.96, 197,885.18 and 79,733.20 is: 110,031.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,395.96 : 197,885.18 = 79,733.20 : x
  2. Step 2: Convert to fraction form
    143,395.96/197,885.18 = 79,733.20/x
  3. Step 3: Cross multiply
    143,395.96x = 197,885.18 × 79,733.20
  4. Step 4: Simplify right side
    143,395.96x = 15,778,018,633.98
  5. Step 5: Solve for x
    x = 15,778,018,633.98/143,395.96
  6. Step 6: Final answer
    x = 110,031.12

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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.