Home / 142,728.48-196,965.36-79,065.36

Finding the Fourth Proportional to 142,728.48, 196,965.36 and 79,065.36

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Solution

The fourth proportional to 142,728.48, 196,965.36 and 79,065.36 is: 109,110.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,728.48 : 196,965.36 = 79,065.36 : x
  2. Step 2: Convert to fraction form
    142,728.48/196,965.36 = 79,065.36/x
  3. Step 3: Cross multiply
    142,728.48x = 196,965.36 × 79,065.36
  4. Step 4: Simplify right side
    142,728.48x = 15,573,137,095.93
  5. Step 5: Solve for x
    x = 15,573,137,095.93/142,728.48
  6. Step 6: Final answer
    x = 109,110.23

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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.