Home / 129,779.84-179,054.22-72,409.86

Finding the Fourth Proportional to 129,779.84, 179,054.22 and 72,409.86

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Solution

The fourth proportional to 129,779.84, 179,054.22 and 72,409.86 is: 99,902.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,779.84 : 179,054.22 = 72,409.86 : x
  2. Step 2: Convert to fraction form
    129,779.84/179,054.22 = 72,409.86/x
  3. Step 3: Cross multiply
    129,779.84x = 179,054.22 × 72,409.86
  4. Step 4: Simplify right side
    129,779.84x = 12,965,291,002.61
  5. Step 5: Solve for x
    x = 12,965,291,002.61/129,779.84
  6. Step 6: Final answer
    x = 99,902.20

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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.