Home / 129,306.36-178,421.92-72,714.36

Finding the Fourth Proportional to 129,306.36, 178,421.92 and 72,714.36

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Solution

The fourth proportional to 129,306.36, 178,421.92 and 72,714.36 is: 100,334.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,306.36 : 178,421.92 = 72,714.36 : x
  2. Step 2: Convert to fraction form
    129,306.36/178,421.92 = 72,714.36/x
  3. Step 3: Cross multiply
    129,306.36x = 178,421.92 × 72,714.36
  4. Step 4: Simplify right side
    129,306.36x = 12,973,835,722.77
  5. Step 5: Solve for x
    x = 12,973,835,722.77/129,306.36
  6. Step 6: Final answer
    x = 100,334.09

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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.