Home / 142,668.19-196,866.21-78,990.04

Finding the Fourth Proportional to 142,668.19, 196,866.21 and 78,990.04

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Solution

The fourth proportional to 142,668.19, 196,866.21 and 78,990.04 is: 108,997.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,668.19 : 196,866.21 = 78,990.04 : x
  2. Step 2: Convert to fraction form
    142,668.19/196,866.21 = 78,990.04/x
  3. Step 3: Cross multiply
    142,668.19x = 196,866.21 × 78,990.04
  4. Step 4: Simplify right side
    142,668.19x = 15,550,469,802.55
  5. Step 5: Solve for x
    x = 15,550,469,802.55/142,668.19
  6. Step 6: Final answer
    x = 108,997.46

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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.