Home / 129,311.16-193,714.55-72,980.87

Finding the Fourth Proportional to 129,311.16, 193,714.55 and 72,980.87

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Solution

The fourth proportional to 129,311.16, 193,714.55 and 72,980.87 is: 109,328.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,311.16 : 193,714.55 = 72,980.87 : x
  2. Step 2: Convert to fraction form
    129,311.16/193,714.55 = 72,980.87/x
  3. Step 3: Cross multiply
    129,311.16x = 193,714.55 × 72,980.87
  4. Step 4: Simplify right side
    129,311.16x = 14,137,457,067.96
  5. Step 5: Solve for x
    x = 14,137,457,067.96/129,311.16
  6. Step 6: Final answer
    x = 109,328.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.