Home / 142,351.72-196,430.34-78,679.24

Finding the Fourth Proportional to 142,351.72, 196,430.34 and 78,679.24

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Solution

The fourth proportional to 142,351.72, 196,430.34 and 78,679.24 is: 108,569.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,351.72 : 196,430.34 = 78,679.24 : x
  2. Step 2: Convert to fraction form
    142,351.72/196,430.34 = 78,679.24/x
  3. Step 3: Cross multiply
    142,351.72x = 196,430.34 × 78,679.24
  4. Step 4: Simplify right side
    142,351.72x = 15,454,989,864.14
  5. Step 5: Solve for x
    x = 15,454,989,864.14/142,351.72
  6. Step 6: Final answer
    x = 108,569.04

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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.