Home / 142,930.90-197,243.28-78,398.81

Finding the Fourth Proportional to 142,930.90, 197,243.28 and 78,398.81

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Solution

The fourth proportional to 142,930.90, 197,243.28 and 78,398.81 is: 108,189.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,930.90 : 197,243.28 = 78,398.81 : x
  2. Step 2: Convert to fraction form
    142,930.90/197,243.28 = 78,398.81/x
  3. Step 3: Cross multiply
    142,930.90x = 197,243.28 × 78,398.81
  4. Step 4: Simplify right side
    142,930.90x = 15,463,638,432.50
  5. Step 5: Solve for x
    x = 15,463,638,432.50/142,930.90
  6. Step 6: Final answer
    x = 108,189.61

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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.