Home / 142,685.96-196,908.76-78,161.14

Finding the Fourth Proportional to 142,685.96, 196,908.76 and 78,161.14

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Solution

The fourth proportional to 142,685.96, 196,908.76 and 78,161.14 is: 107,863.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,685.96 : 196,908.76 = 78,161.14 : x
  2. Step 2: Convert to fraction form
    142,685.96/196,908.76 = 78,161.14/x
  3. Step 3: Cross multiply
    142,685.96x = 196,908.76 × 78,161.14
  4. Step 4: Simplify right side
    142,685.96x = 15,390,611,954.16
  5. Step 5: Solve for x
    x = 15,390,611,954.16/142,685.96
  6. Step 6: Final answer
    x = 107,863.54

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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.