Home / 123,865.18-185,482.20-81,617.20

Finding the Fourth Proportional to 123,865.18, 185,482.20 and 81,617.20

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Solution

The fourth proportional to 123,865.18, 185,482.20 and 81,617.20 is: 122,217.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,865.18 : 185,482.20 = 81,617.20 : x
  2. Step 2: Convert to fraction form
    123,865.18/185,482.20 = 81,617.20/x
  3. Step 3: Cross multiply
    123,865.18x = 185,482.20 × 81,617.20
  4. Step 4: Simplify right side
    123,865.18x = 15,138,537,813.84
  5. Step 5: Solve for x
    x = 15,138,537,813.84/123,865.18
  6. Step 6: Final answer
    x = 122,217.86

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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.