Home / 142,720.40-196,890-106,911.92

Finding the Fourth Proportional to 142,720.40, 196,890 and 106,911.92

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Solution

The fourth proportional to 142,720.40, 196,890 and 106,911.92 is: 147,490.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,720.40 : 196,890 = 106,911.92 : x
  2. Step 2: Convert to fraction form
    142,720.40/196,890 = 106,911.92/x
  3. Step 3: Cross multiply
    142,720.40x = 196,890 × 106,911.92
  4. Step 4: Simplify right side
    142,720.40x = 21,049,887,928.80
  5. Step 5: Solve for x
    x = 21,049,887,928.80/142,720.40
  6. Step 6: Final answer
    x = 147,490.39

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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.