Home / 142,392.72-196,486.92-78,720.24

Finding the Fourth Proportional to 142,392.72, 196,486.92 and 78,720.24

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Solution

The fourth proportional to 142,392.72, 196,486.92 and 78,720.24 is: 108,625.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,392.72 : 196,486.92 = 78,720.24 : x
  2. Step 2: Convert to fraction form
    142,392.72/196,486.92 = 78,720.24/x
  3. Step 3: Cross multiply
    142,392.72x = 196,486.92 × 78,720.24
  4. Step 4: Simplify right side
    142,392.72x = 15,467,497,499.26
  5. Step 5: Solve for x
    x = 15,467,497,499.26/142,392.72
  6. Step 6: Final answer
    x = 108,625.62

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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.