Home / 142,443.72-196,571.16-78,779.88

Finding the Fourth Proportional to 142,443.72, 196,571.16 and 78,779.88

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Solution

The fourth proportional to 142,443.72, 196,571.16 and 78,779.88 is: 108,715.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,443.72 : 196,571.16 = 78,779.88 : x
  2. Step 2: Convert to fraction form
    142,443.72/196,571.16 = 78,779.88/x
  3. Step 3: Cross multiply
    142,443.72x = 196,571.16 × 78,779.88
  4. Step 4: Simplify right side
    142,443.72x = 15,485,852,396.26
  5. Step 5: Solve for x
    x = 15,485,852,396.26/142,443.72
  6. Step 6: Final answer
    x = 108,715.59

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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.