Home / 129,871.08-179,214.12-72,506.64

Finding the Fourth Proportional to 129,871.08, 179,214.12 and 72,506.64

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Solution

The fourth proportional to 129,871.08, 179,214.12 and 72,506.64 is: 100,054.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,871.08 : 179,214.12 = 72,506.64 : x
  2. Step 2: Convert to fraction form
    129,871.08/179,214.12 = 72,506.64/x
  3. Step 3: Cross multiply
    129,871.08x = 179,214.12 × 72,506.64
  4. Step 4: Simplify right side
    129,871.08x = 12,994,213,681.76
  5. Step 5: Solve for x
    x = 12,994,213,681.76/129,871.08
  6. Step 6: Final answer
    x = 100,054.71

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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.