Home / 129,898.96-179,241.34-78,885.16

Finding the Fourth Proportional to 129,898.96, 179,241.34 and 78,885.16

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Solution

The fourth proportional to 129,898.96, 179,241.34 and 78,885.16 is: 108,849.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,898.96 : 179,241.34 = 78,885.16 : x
  2. Step 2: Convert to fraction form
    129,898.96/179,241.34 = 78,885.16/x
  3. Step 3: Cross multiply
    129,898.96x = 179,241.34 × 78,885.16
  4. Step 4: Simplify right side
    129,898.96x = 14,139,481,784.51
  5. Step 5: Solve for x
    x = 14,139,481,784.51/129,898.96
  6. Step 6: Final answer
    x = 108,849.85

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1.5x scale

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.