Home / 142,040.30-196,010.90-78,378.14

Finding the Fourth Proportional to 142,040.30, 196,010.90 and 78,378.14

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Solution

The fourth proportional to 142,040.30, 196,010.90 and 78,378.14 is: 108,159.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,040.30 : 196,010.90 = 78,378.14 : x
  2. Step 2: Convert to fraction form
    142,040.30/196,010.90 = 78,378.14/x
  3. Step 3: Cross multiply
    142,040.30x = 196,010.90 × 78,378.14
  4. Step 4: Simplify right side
    142,040.30x = 15,362,969,761.73
  5. Step 5: Solve for x
    x = 15,362,969,761.73/142,040.30
  6. Step 6: Final answer
    x = 108,159.23

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1.5x scale

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.