Home / 78,855.03-118,281.94-19,690.30

Finding the Fourth Proportional to 78,855.03, 118,281.94 and 19,690.30

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Solution

The fourth proportional to 78,855.03, 118,281.94 and 19,690.30 is: 29,535.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.03 : 118,281.94 = 19,690.30 : x
  2. Step 2: Convert to fraction form
    78,855.03/118,281.94 = 19,690.30/x
  3. Step 3: Cross multiply
    78,855.03x = 118,281.94 × 19,690.30
  4. Step 4: Simplify right side
    78,855.03x = 2,329,006,981.81
  5. Step 5: Solve for x
    x = 2,329,006,981.81/78,855.03
  6. Step 6: Final answer
    x = 29,535.30

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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.