Home / 129,811.50-179,159.31-79,539.66

Finding the Fourth Proportional to 129,811.50, 179,159.31 and 79,539.66

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Solution

The fourth proportional to 129,811.50, 179,159.31 and 79,539.66 is: 109,776.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,811.50 : 179,159.31 = 79,539.66 : x
  2. Step 2: Convert to fraction form
    129,811.50/179,159.31 = 79,539.66/x
  3. Step 3: Cross multiply
    129,811.50x = 179,159.31 × 79,539.66
  4. Step 4: Simplify right side
    129,811.50x = 14,250,270,603.23
  5. Step 5: Solve for x
    x = 14,250,270,603.23/129,811.50
  6. Step 6: Final answer
    x = 109,776.64

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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.