Home / 142,830.54-197,105.81-78,299.66

Finding the Fourth Proportional to 142,830.54, 197,105.81 and 78,299.66

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Solution

The fourth proportional to 142,830.54, 197,105.81 and 78,299.66 is: 108,053.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,830.54 : 197,105.81 = 78,299.66 : x
  2. Step 2: Convert to fraction form
    142,830.54/197,105.81 = 78,299.66/x
  3. Step 3: Cross multiply
    142,830.54x = 197,105.81 × 78,299.66
  4. Step 4: Simplify right side
    142,830.54x = 15,433,318,008.29
  5. Step 5: Solve for x
    x = 15,433,318,008.29/142,830.54
  6. Step 6: Final answer
    x = 108,053.35

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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.