Home / 142,343.20-196,430.16-78,679.36

Finding the Fourth Proportional to 142,343.20, 196,430.16 and 78,679.36

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Solution

The fourth proportional to 142,343.20, 196,430.16 and 78,679.36 is: 108,575.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,343.20 : 196,430.16 = 78,679.36 : x
  2. Step 2: Convert to fraction form
    142,343.20/196,430.16 = 78,679.36/x
  3. Step 3: Cross multiply
    142,343.20x = 196,430.16 × 78,679.36
  4. Step 4: Simplify right side
    142,343.20x = 15,454,999,273.50
  5. Step 5: Solve for x
    x = 15,454,999,273.50/142,343.20
  6. Step 6: Final answer
    x = 108,575.61

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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.