Home / 142,806.12-197,069.94-78,274.80

Finding the Fourth Proportional to 142,806.12, 197,069.94 and 78,274.80

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Solution

The fourth proportional to 142,806.12, 197,069.94 and 78,274.80 is: 108,017.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,806.12 : 197,069.94 = 78,274.80 : x
  2. Step 2: Convert to fraction form
    142,806.12/197,069.94 = 78,274.80/x
  3. Step 3: Cross multiply
    142,806.12x = 197,069.94 × 78,274.80
  4. Step 4: Simplify right side
    142,806.12x = 15,425,610,139.51
  5. Step 5: Solve for x
    x = 15,425,610,139.51/142,806.12
  6. Step 6: Final answer
    x = 108,017.85

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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.