Home / 129,714.18-178,911.09-99,156.36

Finding the Fourth Proportional to 129,714.18, 178,911.09 and 99,156.36

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Solution

The fourth proportional to 129,714.18, 178,911.09 and 99,156.36 is: 136,763.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,714.18 : 178,911.09 = 99,156.36 : x
  2. Step 2: Convert to fraction form
    129,714.18/178,911.09 = 99,156.36/x
  3. Step 3: Cross multiply
    129,714.18x = 178,911.09 × 99,156.36
  4. Step 4: Simplify right side
    129,714.18x = 17,740,172,448.03
  5. Step 5: Solve for x
    x = 17,740,172,448.03/129,714.18
  6. Step 6: Final answer
    x = 136,763.56

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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.