Home / 142,709.21-196,938.95-78,177.04

Finding the Fourth Proportional to 142,709.21, 196,938.95 and 78,177.04

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Solution

The fourth proportional to 142,709.21, 196,938.95 and 78,177.04 is: 107,884.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,709.21 : 196,938.95 = 78,177.04 : x
  2. Step 2: Convert to fraction form
    142,709.21/196,938.95 = 78,177.04/x
  3. Step 3: Cross multiply
    142,709.21x = 196,938.95 × 78,177.04
  4. Step 4: Simplify right side
    142,709.21x = 15,396,103,506.24
  5. Step 5: Solve for x
    x = 15,396,103,506.24/142,709.21
  6. Step 6: Final answer
    x = 107,884.44

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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.