Home / 78,855.41-118,282.50-19,690.68

Finding the Fourth Proportional to 78,855.41, 118,282.50 and 19,690.68

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Solution

The fourth proportional to 78,855.41, 118,282.50 and 19,690.68 is: 29,535.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.41 : 118,282.50 = 19,690.68 : x
  2. Step 2: Convert to fraction form
    78,855.41/118,282.50 = 19,690.68/x
  3. Step 3: Cross multiply
    78,855.41x = 118,282.50 × 19,690.68
  4. Step 4: Simplify right side
    78,855.41x = 2,329,062,857.10
  5. Step 5: Solve for x
    x = 2,329,062,857.10/78,855.41
  6. Step 6: Final answer
    x = 29,535.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.