Home / 142,320.12-196,399.98-77,789.04

Finding the Fourth Proportional to 142,320.12, 196,399.98 and 77,789.04

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Solution

The fourth proportional to 142,320.12, 196,399.98 and 77,789.04 is: 107,347.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,320.12 : 196,399.98 = 77,789.04 : x
  2. Step 2: Convert to fraction form
    142,320.12/196,399.98 = 77,789.04/x
  3. Step 3: Cross multiply
    142,320.12x = 196,399.98 × 77,789.04
  4. Step 4: Simplify right side
    142,320.12x = 15,277,765,900.22
  5. Step 5: Solve for x
    x = 15,277,765,900.22/142,320.12
  6. Step 6: Final answer
    x = 107,347.90

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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.