Home / 143,138.16-197,531.28-79,475.76

Finding the Fourth Proportional to 143,138.16, 197,531.28 and 79,475.76

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Solution

The fourth proportional to 143,138.16, 197,531.28 and 79,475.76 is: 109,676.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,138.16 : 197,531.28 = 79,475.76 : x
  2. Step 2: Convert to fraction form
    143,138.16/197,531.28 = 79,475.76/x
  3. Step 3: Cross multiply
    143,138.16x = 197,531.28 × 79,475.76
  4. Step 4: Simplify right side
    143,138.16x = 15,698,948,601.77
  5. Step 5: Solve for x
    x = 15,698,948,601.77/143,138.16
  6. Step 6: Final answer
    x = 109,676.89

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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.