Home / 142,822.82-197,084.85-78,281.75

Finding the Fourth Proportional to 142,822.82, 197,084.85 and 78,281.75

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Solution

The fourth proportional to 142,822.82, 197,084.85 and 78,281.75 is: 108,022.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,822.82 : 197,084.85 = 78,281.75 : x
  2. Step 2: Convert to fraction form
    142,822.82/197,084.85 = 78,281.75/x
  3. Step 3: Cross multiply
    142,822.82x = 197,084.85 × 78,281.75
  4. Step 4: Simplify right side
    142,822.82x = 15,428,145,971.06
  5. Step 5: Solve for x
    x = 15,428,145,971.06/142,822.82
  6. Step 6: Final answer
    x = 108,022.98

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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.