Home / 143,434.89-197,939.05-78,902.74

Finding the Fourth Proportional to 143,434.89, 197,939.05 and 78,902.74

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Solution

The fourth proportional to 143,434.89, 197,939.05 and 78,902.74 is: 108,885.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,434.89 : 197,939.05 = 78,902.74 : x
  2. Step 2: Convert to fraction form
    143,434.89/197,939.05 = 78,902.74/x
  3. Step 3: Cross multiply
    143,434.89x = 197,939.05 × 78,902.74
  4. Step 4: Simplify right side
    143,434.89x = 15,617,932,211.04
  5. Step 5: Solve for x
    x = 15,617,932,211.04/143,434.89
  6. Step 6: Final answer
    x = 108,885.17

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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.