Home / 144,008.10-215,720.55-81,605.70

Finding the Fourth Proportional to 144,008.10, 215,720.55 and 81,605.70

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Solution

The fourth proportional to 144,008.10, 215,720.55 and 81,605.70 is: 122,243.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,008.10 : 215,720.55 = 81,605.70 : x
  2. Step 2: Convert to fraction form
    144,008.10/215,720.55 = 81,605.70/x
  3. Step 3: Cross multiply
    144,008.10x = 215,720.55 × 81,605.70
  4. Step 4: Simplify right side
    144,008.10x = 17,604,026,487.14
  5. Step 5: Solve for x
    x = 17,604,026,487.14/144,008.10
  6. Step 6: Final answer
    x = 122,243.31

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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.