Home / 189,142.89-261,013.53-103,102.66

Finding the Fourth Proportional to 189,142.89, 261,013.53 and 103,102.66

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Solution

The fourth proportional to 189,142.89, 261,013.53 and 103,102.66 is: 142,279.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,142.89 : 261,013.53 = 103,102.66 : x
  2. Step 2: Convert to fraction form
    189,142.89/261,013.53 = 103,102.66/x
  3. Step 3: Cross multiply
    189,142.89x = 261,013.53 × 103,102.66
  4. Step 4: Simplify right side
    189,142.89x = 26,911,189,238.99
  5. Step 5: Solve for x
    x = 26,911,189,238.99/189,142.89
  6. Step 6: Final answer
    x = 142,279.68

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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.