Home / 142,136.51-196,143.32-78,474.15

Finding the Fourth Proportional to 142,136.51, 196,143.32 and 78,474.15

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Solution

The fourth proportional to 142,136.51, 196,143.32 and 78,474.15 is: 108,291.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,136.51 : 196,143.32 = 78,474.15 : x
  2. Step 2: Convert to fraction form
    142,136.51/196,143.32 = 78,474.15/x
  3. Step 3: Cross multiply
    142,136.51x = 196,143.32 × 78,474.15
  4. Step 4: Simplify right side
    142,136.51x = 15,392,180,511.36
  5. Step 5: Solve for x
    x = 15,392,180,511.36/142,136.51
  6. Step 6: Final answer
    x = 108,291.54

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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.