Home / 137,143.88-189,272.80-79,002.61

Finding the Fourth Proportional to 137,143.88, 189,272.80 and 79,002.61

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Solution

The fourth proportional to 137,143.88, 189,272.80 and 79,002.61 is: 109,031.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,143.88 : 189,272.80 = 79,002.61 : x
  2. Step 2: Convert to fraction form
    137,143.88/189,272.80 = 79,002.61/x
  3. Step 3: Cross multiply
    137,143.88x = 189,272.80 × 79,002.61
  4. Step 4: Simplify right side
    137,143.88x = 14,953,045,202.01
  5. Step 5: Solve for x
    x = 14,953,045,202.01/137,143.88
  6. Step 6: Final answer
    x = 109,031.81

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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.